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Shreyasi Acharya - One of the best experts on this subject based on the ideXlab platform.
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Jet-associated deuteron production in pp collisions at $\sqrt{s}=13$ TeV
2020Co-Authors: Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Gianluca Aglieri Rinella, Michelangelo Agnello, Zubayer Ahammed, Neelima Agrawal, Shakeel Ahmad, Sang Un AhnAbstract:Deuteron production in high-energy collisions is sensitive to the space-time evolution of the collision system, and is typically described by a coalescence mechanism. For the first time, we present results on jet-associated deuteron production in \pp\ collisions at $\sqrt{s}=13$ TeV, providing an opportunity to test the established picture for deuteron production in events with a hard scattering. Using a trigger particle with high transverse-momentum ($p_{\rm T}>5$ GeV/$c$) as a proxy for the presence of a jet at midrapidity, we observe a measurable population of Deuterons being produced around the jet proxy. The associated deuteron yield measured in a narrow angular range around the trigger particle differs by 2.4-4.8 standard deviations from the uncorrelated background. The data are described by PYTHIA model calculations featuring baryon coalescence.
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anti deuteron production in pp collisions at s 13tev
European Physical Journal C, 2020Co-Authors: Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, M M Aggarwal, N Agrawal, Aglieri G Rinella, S AhmadAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $\text {(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).
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multiplicity dependence of anti deuteron production in pp collisions at s 7 tev
Physics Letters B, 2019Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, M M Aggarwal, Gianluca Aglieri Rinella, Fernando Torales Acosta, Souvik Priyam Adhya, C Adler, Zubayer AhammedAbstract:In this letter, the production of Deuterons and anti-Deuterons in pp collisions at √s=7 TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (pT). The measurements are discussed in the context of hadron-coalescence models. The coalescence parameter B2, extracted from the measured spectra of (anti-)Deuterons and primary (anti-)protons, exhibits no significant pT-dependence for pT < 3 GeV/c, in agreement with the expectations of a simple coalescence picture. At fixed transverse momentum per nucleon, the B2 parameter is found to decrease smoothly from low multiplicity pp Pb-Pb collisions, in qualitative agreement with more elaborate coalescence models. The measured mean transverse momentum of (anti-)Deuterons in pp is not reproduced by the Blast-Wave model calculations that simultaneously describe pion, kaon and proton spectra, in contrast to central Pb-Pb collisions. The ratio between the pT-integrated yield of Deuterons to protons, d/p, is found to increase with the charged-particle multiplicity, as observed in inelastic pp collisions at different centre-of-mass energies. The d/p ratios are reported in a wide range, from the lowest to the highest multiplicity values measured in pp collisions at the LHC.
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production of Deuterons tritons he 3 nuclei and their antinuclei in pp collisions at s 0 9 2 76 and 7 tev
Physical Review C, 2018Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, J Adam, M M Aggarwal, Gianluca Aglieri Rinella, N Agrawal, S AhmadAbstract:Invariant differential yields of Deuterons and antiDeuterons in pp collisions at s = 0.9, 2.76 and 7 TeV and the yields of tritons, He3 nuclei, and their antinuclei at s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y|<0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A=2 and 6 GeV/c for A=3. The coalescence parameters of (anti)Deuterons and He¯3 nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low pT and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.
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production of Deuterons tritons 3he nuclei and their antinuclei in pp collisions at s 0 9 2 76 and 7 tev
Physical Review C, 2018Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, J Adam, M M Aggarwal, Gianluca Aglieri Rinella, N Agrawal, S AhmadAbstract:Invariant differential yields of Deuterons and antiDeuterons in pp collisions at s = 0.9, 2.76 and 7 TeV and the yields of tritons, He3 nuclei, and their antinuclei at s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y|<0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A=2 and 6 GeV/c for A=3. The coalescence parameters of (anti)Deuterons and He¯3 nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low pT and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.
Zubayer Ahammed - One of the best experts on this subject based on the ideXlab platform.
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Jet-associated deuteron production in pp collisions at $\sqrt{s}=13$ TeV
2020Co-Authors: Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Gianluca Aglieri Rinella, Michelangelo Agnello, Zubayer Ahammed, Neelima Agrawal, Shakeel Ahmad, Sang Un AhnAbstract:Deuteron production in high-energy collisions is sensitive to the space-time evolution of the collision system, and is typically described by a coalescence mechanism. For the first time, we present results on jet-associated deuteron production in \pp\ collisions at $\sqrt{s}=13$ TeV, providing an opportunity to test the established picture for deuteron production in events with a hard scattering. Using a trigger particle with high transverse-momentum ($p_{\rm T}>5$ GeV/$c$) as a proxy for the presence of a jet at midrapidity, we observe a measurable population of Deuterons being produced around the jet proxy. The associated deuteron yield measured in a narrow angular range around the trigger particle differs by 2.4-4.8 standard deviations from the uncorrelated background. The data are described by PYTHIA model calculations featuring baryon coalescence.
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anti deuteron production in pp collisions at s 13tev
European Physical Journal C, 2020Co-Authors: Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, M M Aggarwal, N Agrawal, Aglieri G Rinella, S AhmadAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $\text {(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).
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(Anti-)deuteron production in pp collisions at
'Springer Science and Business Media LLC', 2020Co-Authors: S. Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, M M Aggarwal, N Agrawal, Aglieri G Rinella, A. Adler, S AhmadAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $$\text {(anti-)Deuterons}$$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $$\sqrt{s}=13$$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
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multiplicity dependence of anti deuteron production in pp collisions at s 7 tev
Physics Letters B, 2019Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, M M Aggarwal, Gianluca Aglieri Rinella, Fernando Torales Acosta, Souvik Priyam Adhya, C Adler, Zubayer AhammedAbstract:In this letter, the production of Deuterons and anti-Deuterons in pp collisions at √s=7 TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (pT). The measurements are discussed in the context of hadron-coalescence models. The coalescence parameter B2, extracted from the measured spectra of (anti-)Deuterons and primary (anti-)protons, exhibits no significant pT-dependence for pT < 3 GeV/c, in agreement with the expectations of a simple coalescence picture. At fixed transverse momentum per nucleon, the B2 parameter is found to decrease smoothly from low multiplicity pp Pb-Pb collisions, in qualitative agreement with more elaborate coalescence models. The measured mean transverse momentum of (anti-)Deuterons in pp is not reproduced by the Blast-Wave model calculations that simultaneously describe pion, kaon and proton spectra, in contrast to central Pb-Pb collisions. The ratio between the pT-integrated yield of Deuterons to protons, d/p, is found to increase with the charged-particle multiplicity, as observed in inelastic pp collisions at different centre-of-mass energies. The d/p ratios are reported in a wide range, from the lowest to the highest multiplicity values measured in pp collisions at the LHC.
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production of Deuterons tritons he 3 nuclei and their antinuclei in pp collisions at s 0 9 2 76 and 7 tev
Physical Review C, 2018Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, J Adam, M M Aggarwal, Gianluca Aglieri Rinella, N Agrawal, S AhmadAbstract:Invariant differential yields of Deuterons and antiDeuterons in pp collisions at s = 0.9, 2.76 and 7 TeV and the yields of tritons, He3 nuclei, and their antinuclei at s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y|<0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A=2 and 6 GeV/c for A=3. The coalescence parameters of (anti)Deuterons and He¯3 nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low pT and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.
S Ahmad - One of the best experts on this subject based on the ideXlab platform.
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anti deuteron production in pp collisions at s 13tev
European Physical Journal C, 2020Co-Authors: Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, M M Aggarwal, N Agrawal, Aglieri G Rinella, S AhmadAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $\text {(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).
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(Anti-)deuteron production in pp collisions at
'Springer Science and Business Media LLC', 2020Co-Authors: S. Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, M M Aggarwal, N Agrawal, Aglieri G Rinella, A. Adler, S AhmadAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $$\text {(anti-)Deuterons}$$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $$\sqrt{s}=13$$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
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production of Deuterons tritons he 3 nuclei and their antinuclei in pp collisions at s 0 9 2 76 and 7 tev
Physical Review C, 2018Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, J Adam, M M Aggarwal, Gianluca Aglieri Rinella, N Agrawal, S AhmadAbstract:Invariant differential yields of Deuterons and antiDeuterons in pp collisions at s = 0.9, 2.76 and 7 TeV and the yields of tritons, He3 nuclei, and their antinuclei at s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y|<0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A=2 and 6 GeV/c for A=3. The coalescence parameters of (anti)Deuterons and He¯3 nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low pT and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.
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production of Deuterons tritons 3he nuclei and their antinuclei in pp collisions at s 0 9 2 76 and 7 tev
Physical Review C, 2018Co-Authors: Shreyasi Acharya, Dagmar Adamova, Jonatan Adolfsson, Michelangelo Agnello, Zubayer Ahammed, J Adam, M M Aggarwal, Gianluca Aglieri Rinella, N Agrawal, S AhmadAbstract:Invariant differential yields of Deuterons and antiDeuterons in pp collisions at s = 0.9, 2.76 and 7 TeV and the yields of tritons, He3 nuclei, and their antinuclei at s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y|<0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A=2 and 6 GeV/c for A=3. The coalescence parameters of (anti)Deuterons and He¯3 nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low pT and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti)nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.
Acharya S. - One of the best experts on this subject based on the ideXlab platform.
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Multiplicity dependence of light (anti-)nuclei production in p–Pb collisions at √sNN=5.02 TeV
'Elsevier BV', 2020Co-Authors: Acharya S., Antičić Tome, Erhardt Filip, Gotovac Sven, Jerčić Marko, Lončar Petra, Mudnić Eugen, Planinić Mirko, Poljak Nikola, Simatović GoranAbstract:The measurement of the deuteron and anti- deuteron production in the rapidity range −1 < y < 0 as a function of transverse momentum and event multiplicity in p–Pb collisions at √sNN= 5.02 TeV is presented. (Anti-)Deuterons are identified via their specific energy loss dE/dxand via their time-of-flight. Their production in p–Pb collisions is compared to pp and Pb–Pb collisions and is discussed within the context of thermal and coalescence models. The ratio of integrated yields of Deuterons to protons (d/p) shows a significant increase as a function of the charged-particle multiplicity of the event starting from values similar to those observed in pp collisions at low multiplicities and approaching those observed in Pb–Pb collisions at high multiplicities. The mean transverse particle momenta are extracted from the deuteron spectra and the values are similar to those obtained for p and particles. Thus, deuteron spectra do not follow mass ordering. This behaviour is in contrast to the trend observed for non-composite particles in p–Pb collisions. In addition, the production of the rare 3He and 3He nuclei has been studied. The spectrum corresponding to all non-single diffractive p-Pb collisions is obtained in the rapidity window −1 < y < 0 and the pT- integrated yield dN/dyis extracted. It is found that the yields of protons, Deuterons, and 3He, normalised by the spin degeneracy factor, follow an exponential decrease with mass number
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Multiplicity dependence of light (anti-)nuclei production in p-Pb collisions at root s(NN)=5.02 TeV
'Elsevier BV', 2020Co-Authors: Acharya S., Adamova D., Adhya S. P., Adler A., Adolfsson J., Aggarwal M. M., Rinella G. Aglieri, Agnello M., Agrawal N., Ahammed Z.Abstract:The measurement of the deuteron and anti-deuteron production in the rapidity range -1 < y < 0 as a function of transverse momentum and event multiplicity in p-Pb collisions at root s(NN) = 5.02 TeV is presented. (Anti-)Deuterons are identified via their specific energy loss dE/dx and via their time-of-flight. Their production in p-Pb collisions is compared to pp and Pb-Pb collisions and is discussed within the context of thermal and coalescence models. The ratio of integrated yields of Deuterons to protons (d/p) shows a significant increase as a function of the charged-particle multiplicity of the event starting from values similar to those observed in pp collisions at low multiplicities and approaching those observed in Pb-Pb collisions at high multiplicities. The mean transverse particle momenta are extracted from the deuteron spectra and the values are similar to those obtained for p and Lambda particles. Thus, deuteron spectra do not follow mass ordering. This behaviour is in contrast to the trend observed for non-composite particles in p-Pb collisions. In addition, the production of the rare He-3 and (3)(He) over bar nuclei has been studied. The spectrum corresponding to all non-single diffractive p-Pb collisions is obtained in the rapidity window -1 < y < 0 and the p(T)-integrated yield dN/dy is extracted. It is found that the yields of protons, Deuterons, and He-3, normalised by the spin degeneracy factor, follow an exponential decrease with mass number. (C) 2019 Published by Elsevier B.V
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(Anti-)Deuteron production in pp collisions at $\sqrt{s}=13$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya S., Adamova Dagmar, Adler Alexander, Adolfsson Jonatan, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Ahmad ShakeelAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high energy hadronic collisions. In this paper the production of $\text{(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large accumulated integrated luminosity, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($\rm{d} N_{ch}/\rm{d}\eta\sim26$) as measured in p-Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p-Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and Statistical Hadronisation Models (SHM).The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high energy hadronic collisions. In this paper the production of $\text{(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large accumulated integrated luminosity, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($\rm{d} N_{ch}/\rm{d}\eta\sim26$) as measured in p-Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p-Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and Statistical Hadronisation Models (SHM).The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $\text {(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
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(Anti-)deuteron production in pp collisions at √=13 TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya S., Antičić Tome, Erhardt Filip, Gotovac Sven, Jerčić Marko, Lončar Petra, Mudnić Eugen, Planinić Mirko, Poljak Nikola, Simatović GoranAbstract:The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in highenergy hadronic collisions. In this paper the production of (anti-)Deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at √s = 13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (dNch/dη ∼ 26) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
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(Anti-)deuteron production in pp collisions at $\sqrt{s}=13 \ \text {TeV}$
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya S., Adamova Dagmar, Adler Alexander, Adolfsson Jonatan, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Ahmad ShakeelAbstract:International audienceThe study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $\text {(anti-)Deuterons}$ is studied as a function of the charged particle multiplicity in inelastic pp collisions at $\sqrt{s}=13$ TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
Koch Volker - One of the best experts on this subject based on the ideXlab platform.
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Deuteron production in AuAu collisions at $\sqrt{s_{NN}} = 7-200$ GeV via pion catalysis
eScholarship University of California, 2020Co-Authors: Oliinychenko Dmytro, Shen Chun, Koch VolkerAbstract:We study deuteron production using no-coalescence hydrodynamic + transport simulations of central AuAu collisions at $\sqrt{s_{NN}} = 7 - 200$ GeV. Deuterons are sampled thermally at the transition from hydrodynamics to transport, and interact in transport dominantly via $\pi p n \leftrightarrow \pi d$ reactions. The measured proton, Lambda, and deuteron transverse momentum spectra and yields are reproduced well for all collision energies considered. We further provide a possible explanation for the measured minimum in the energy dependence of the coalescence parameter, $B_2(\sqrt{s_{NN}})$ as well as for the difference between $B_2(d)$ for Deuterons and that for anti-Deuterons, $B_2(\bar{d})$
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Deuteron production in AuAu collisions at $\sqrt{s_{NN}} = 7-200$ GeV via pion catalysis
2020Co-Authors: Oliinychenko Dmytro, Shen Chun, Koch VolkerAbstract:We study deuteron production using no-coalescence hydrodynamic + transport simulations of central AuAu collisions at $\sqrt{s_{NN}} = 7 - 200$ GeV. Deuterons are sampled thermally at the transition from hydrodynamics to transport, and interact in transport dominantly via $\pi p n \leftrightarrow \pi d$ reactions. The measured proton, Lambda, and deuteron transverse momentum spectra and yields are reproduced well for all collision energies considered. We further provide a possible explanation for the measured minimum in the energy dependence of the coalescence parameter, $B_2(\sqrt{s_{NN}})$ as well as for the difference between $B_2(d)$ for Deuterons and that for anti-Deuterons, $B_2(\bar{d})$.Comment: 11 pages, 6 figure
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Deuterons at LHC: "snowballs in hell" via hydrodynamics and hadronic afterburner
'American Physical Society (APS)', 2019Co-Authors: Oliinychenko Dmytro, Pang Long-gang, Elfner Hannah, Koch VolkerAbstract:The deuteron yield in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV is consistent with thermal production at a freeze-out temperature of $T = 155$ MeV. The existence of Deuterons with binding energy of 2.2 MeV at this temperature was described as "snowballs in hell". We provide a microscopic explanation of this phenomenon, utilizing relativistic hydrodynamics and switching to a hadronic afterburner at the above mentioned temperature of $T = 155$ MeV. The measured deuteron $p_T$-spectra and coalescence parameter $B_2(p_T)$ are reproduced without free parameters, only by implementing experimentally known cross-sections of deuteron reactions with hadrons, most importantly $\pi d \leftrightarrow \pi n p$.Comment: 13 pages, 10 figures, version accepted to publicatio