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Ahmad Shakeel - One of the best experts on this subject based on the ideXlab platform.
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Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:Measurement of Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity $-4 20$ GeV/$c$ in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass $60 20 GeV/c in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass 60 20$ GeV/$c$ in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass $60 < m^{\mu\mu} < 120$ GeV$c^2$ and rapidity $2.5 < y_{cms}^{\mu\mu} < 4$. They are presented as a function of rapidity and, for the Pb-Pb collisions, of centrality as well. The results are compared with theoretical calculations, both with and without nuclear Modifications to the Parton Distribution Functions (PDFs). In p-Pb collisions the center-of-mass frame is boosted with respect to the laboratory frame, and the measurements cover the backward ($-4.46< y_{cms}^{\mu\mu}
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Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:International audienceMeasurement of Z-boson production in p-Pb collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 8.16 TeV and Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity −4 20 GeV/c in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass 60 < m$_{μμ}$< 120 GeV/c$^{2}$ and rapidity 2.5
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Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ and 2.76 TeV
HAL CCSD, 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad Shakeel, Sang Un AhnAbstract:Measurements of the production of muons from heavy-flavour hadron decays in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = $5.02$ and $2.76$ TeV using the ALICE detector at the LHC are reported. The nuclear Modification Factor $R_{\rm AA}$ at $\sqrt{s_{\rm NN}}$ = 5.02 TeV is measured at forward rapidity ($2.5 < y
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$ϒ$ production in p–Pb collisions at $\sqrt{s_{NN}}$=8.16 TeV
'Elsevier BV', 2020Co-Authors: Acharya Shreyasi, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Adamova Dagma, Adle Alexande, Adolfsso Jonata, Aggarwal, Mada Moha, Ahammed Zubaye, Ahmad ShakeelAbstract:International audience$\Upsilon$ production in p-Pb interactions is studied at the centre-of-mass energy per nucleon-nucleon collision $\sqrt{s_{\rm{NN}}}$ = 8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals $2.03 < y_{\rm{cms}} < 3.53$ and $-4.46 < y_{\rm{cms}} < -2.96$, down to zero transverse momentum. In this work, results on the inclusive $\Upsilon(1\rm{S})$ production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear Modification Factor shows a suppression of the $\Upsilon(1\rm{S})$ yields with respect to pp collisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the $\Upsilon(2\rm{S})$ nuclear Modification Factor is also evaluated, suggesting a suppression similar to that of the $\Upsilon(1\rm{S})$. A first measurement of the $\Upsilon(3\rm{S})$ has also been performed. Finally, results are compared with previous measurements performed by ALICE in p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV and with theoretical calculations
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Measurement of nuclear effects on $\psi\rm{(2S)}$ production in p-Pb collisions at $\sqrt{\textit{s}_{\rm NN}} = 8.16$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:International audienceInclusive ψ(2S) production is measured in p-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair $ \sqrt{s_{\mathrm{NN}}} $ = 8.16 TeV, using the ALICE detector at the CERN LHC. The production of ψ(2S) is studied at forward (2.03 < y$_{cms}$< 3.53) and backward (−4.46 < y$_{cms}$< −2.96) centre-of-mass rapidity and for transverse momentum p$_{T}$< 12 GeV/c via the decay to muon pairs. In this paper, we report the integrated as well as the y$_{cms}$- and p$_{T}$-differential inclusive production cross sections. Nuclear effects on ψ(2S) production are studied via the determination of the nuclear Modification Factor that shows a strong suppression at both forward and backward centre-of-mass rapidities. Comparisons with corresponding results for inclusive J/ψ show a similar suppression for the two states at forward rapidity (p-going direction), but a stronger suppression for ψ(2S) at backward rapidity (Pb-going direction). As a function of p$_{T}$, no clear dependence of the nuclear Modification Factor is found. The relative size of nuclear effects on ψ(2S) production compared to J/ψ is also studied via the double ratio of production cross sections [σ$_{ψ(2S)}$/σ$_{J/ψ}$]pPb/[σ$_{ψ(2S)}$/σ$_{J/ψ}$]$_{pp}$ between p-Pb and pp collisions. The results are compared with theoretical models that include various effects related to the initial and final state of the collision system and also with previous measurements at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV.[graphic not available: see fulltext
J Adam - One of the best experts on this subject based on the ideXlab platform.
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centrality dependence of the nuclear Modification Factor of charged pions kaons and protons in pb pb collisions at snn 2 76 tev
Physical Review C, 2016Co-Authors: J Adam, M M Aggarwal, Z Ahammed, Michelangelo Agnello, Aglieri G Rinella, D Adamova, N Agrawal, Sang Un Ahn, I Aimo, S AiolaAbstract:Transverse momentum (pT) spectra of pions, kaons, and protons up to pT=20GeV/c have been measured in Pb-Pb collisions at √sNN=2.76TeV using the ALICE detector for six different centrality classes covering 0%–80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT≈3GeV/c in central Pb-Pb collisions that decreases for more peripheral collisions. For pT>10GeV/c, the nuclear Modification Factor is found to be the same for all three particle species in each centrality interval within systematic uncertainties of 10%–20%. This suggests there is no direct interplay between the energy loss in the medium and the particle species composition in the hard core of the quenched jet. For pT<10GeV/c, the data provide important constraints for models aimed at describing the transition from soft to hard physics.
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measurement of d _s production and nuclear Modification Factor in pb pb collisions at sqrt s_ rm nn 2 76 tev
Journal of High Energy Physics, 2016Co-Authors: J Adam, L Aphecetche, A Baldisseri, G Batigne, I Belikov, H Borel, Castillo J Castellanos, J L Charvet, C Cheshkov, B CheynisAbstract:The production of prompt D$_s^+$ mesons was measured for the first time in collisions of heavy nuclei with the ALICE detector at the LHC. The analysis was performed on a data sample of Pb-Pb collisions at a centre-of-mass energy per nucleon pair, $\sqrt{s_{\rm NN}}$, of 2.76 TeV in two different centrality classes, namely 0-10% and 20-50%. D$_s^+$ mesons and their antiparticles were reconstructed at mid-rapidity from their hadronic decay channel D$_s^+\rightarrow\phi\pi^+$, with $\phi\rightarrow$K$^-$K$^+$, in the transverse momentum intervals $4< p_{\rm T}<12$ GeV/$c$ and $6< p_{\rm T}<12$ GeV/$c$ for the 0-10% and 20-50% centrality classes, respectively. The nuclear Modification Factor $R_{\rm AA}$ was computed by comparing the $p_{\rm T}$-differential production yields in Pb-Pb collisions to those in proton-proton (pp) collisions at the same energy. This pp reference was obtained using the cross section measured at $\sqrt{s}= 7$ TeV and scaled to $\sqrt{s}= 2.76$ TeV. The $R_{\rm AA}$ of D$_s^+$ mesons was compared to that of non-strange D mesons in the 10% most central Pb-Pb collisions. At high $p_{\rm T}$ ($8< p_{\rm T}<12$ GeV/$c$) a suppression of the D$_s^+$-meson yield by a Factor of about three, compatible within uncertainties with that of non-strange D mesons, is observed. At lower $p_{\rm T}$ ($4< p_{\rm T}<8$ GeV/$c$) the values of the D$_s^+$-meson $R_{\rm AA}$ are larger than those of non-strange D mesons, although compatible within uncertainties. The production ratios D$_s^+$/D$^0$ and D$_s^+$\D$^+$ were also measured in Pb-Pb collisions and compared to their values in proton-proton collisions.
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rapidity and transverse momentum dependence of the inclusive j mathbf psi nuclear Modification Factor in p pb collisions at mathbf sqrt textit s _ nn 5 02 tev
Journal of High Energy Physics, 2015Co-Authors: J Adam, L D Hanratty, Jovan Milosevic, M Bregant, M Marchisone, E Garciasolis, Ernesto Calvo Villar, R Majka, S G Weber, Pierre Vande VyvreAbstract:We have studied the transverse-momentum ($p_{\rm T}$) dependence of the inclusive J/$\psi$ production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in three center-of-mass rapidity ($y_{\rm cms}$) regions, down to zero $p_{\rm T}$. Results in the forward and backward rapidity ranges ($2.03 < y_{\rm cms} < 3.53$ and $-4.46
R Sahoo - One of the best experts on this subject based on the ideXlab platform.
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transverse momentum spectra and nuclear Modification Factor using boltzmann transport equation with flow in pb pb collisions at sqrt s_ nn 2 76 tev
European Physical Journal A, 2017Co-Authors: Sushanta Tripathy, Swatantra Kumar Tiwari, Arvind Khuntia, R SahooAbstract:In the continuation of our previous work, the transverse-momentum (\(p_{T}\)) spectra and nuclear Modification Factor (\(R_{AA}\)) are derived using the relaxation time approximation of Boltzmann Transport Equation (BTE). The initial \(p_{T}\)-distribution used to describe p + p collisions has been studied with the perturbative-Quantum Chromodynamics (pQCD) inspired power-law distribution, Hagedorn's empirical formula and with the Tsallis non-extensive statistical distribution. The non-extensive Tsallis distribution is observed to describe the complete range of the transverse-momentum spectra. The Boltzmann-Gibbs Blast Wave (BGBW) distribution is used as the equilibrium distribution in the present formalism, to describe the \(p_{T}\)-distribution and nuclear Modification Factor in nucleus-nucleus collisions. The experimental data for Pb+Pb collisions at \(\sqrt{s_{NN}} = 2.76\) TeV at the Large Hadron Collider at CERN have been analyzed for pions, kaons, protons, \(K^{\ast0}\) and \(\phi\). It is observed that the present formalism while explaining the transverse-momentum spectra up to 5 GeV/c, explains the nuclear Modification Factor very well up to 8 GeV/c in \(p_{T}\) for all these particles except for protons. \(R_{AA}\) is found to be independent of the degree of non-extensivity, \(q_{pp}\) after \(p_{T} \sim 8\) GeV/c.
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transverse momentum spectra and nuclear Modification Factor using boltzmann transport equation with flow in pb pb collisions at sqrt s_ nn 2 76 tev
arXiv: Nuclear Theory, 2017Co-Authors: Sushanta Tripathy, Swatantra Kumar Tiwari, Arvind Khuntia, R SahooAbstract:In the continuation of our previous work, the transverse momentum ($p_T$) spectra and nuclear Modification Factor ($R_{AA}$) are derived using relaxation time approximation of Boltzmann Transport Equation (BTE). The initial $p_T$-distribution used to describe $p+p$ collisions has been studied with the pQCD inspired power-law distribution, the Hagedorn's empirical formula and with the Tsallis non-extensive statistical distribution. The non-extensive Tsallis distribution is observed to describe the complete range of the transverse momentum spectra. The Boltzmann-Gibbs Blast Wave (BGBW) distribution is used as the equilibrium distribution in the present formalism, to describe the $p_T$-distribution and nuclear Modification Factor in nucleus-nucleus collisions. The experimental data for Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV at the Large Hadron Collider at CERN have been analyzed for pions, kaons, protons, $K^{*0}$ and $\phi$. It is observed that the present formalism while explaining the transverse momentum spectra upto 5 GeV/c, explains the nuclear Modification Factor very well upto 8 GeV/c in $p_T$ for all these particles except for protons. $R_{AA}$ is found to be independent of the degree of non-extensivity, $q_{pp}$ after $p_T \sim$ 8 GeV/c.
Acharya Shreyasi - One of the best experts on this subject based on the ideXlab platform.
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Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:Measurement of Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity $-4 20$ GeV/$c$ in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass $60 20 GeV/c in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass 60 20$ GeV/$c$ in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass $60 < m^{\mu\mu} < 120$ GeV$c^2$ and rapidity $2.5 < y_{cms}^{\mu\mu} < 4$. They are presented as a function of rapidity and, for the Pb-Pb collisions, of centrality as well. The results are compared with theoretical calculations, both with and without nuclear Modifications to the Parton Distribution Functions (PDFs). In p-Pb collisions the center-of-mass frame is boosted with respect to the laboratory frame, and the measurements cover the backward ($-4.46< y_{cms}^{\mu\mu}
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Z-boson production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:International audienceMeasurement of Z-boson production in p-Pb collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 8.16 TeV and Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity −4 20 GeV/c in the laboratory frame. The invariant yield and nuclear Modification Factor are measured for opposite-sign dimuons with invariant mass 60 < m$_{μμ}$< 120 GeV/c$^{2}$ and rapidity 2.5
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Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ and 2.76 TeV
HAL CCSD, 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad Shakeel, Sang Un AhnAbstract:Measurements of the production of muons from heavy-flavour hadron decays in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = $5.02$ and $2.76$ TeV using the ALICE detector at the LHC are reported. The nuclear Modification Factor $R_{\rm AA}$ at $\sqrt{s_{\rm NN}}$ = 5.02 TeV is measured at forward rapidity ($2.5 < y
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$ϒ$ production in p–Pb collisions at $\sqrt{s_{NN}}$=8.16 TeV
'Elsevier BV', 2020Co-Authors: Acharya Shreyasi, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Adamova Dagma, Adle Alexande, Adolfsso Jonata, Aggarwal, Mada Moha, Ahammed Zubaye, Ahmad ShakeelAbstract:International audience$\Upsilon$ production in p-Pb interactions is studied at the centre-of-mass energy per nucleon-nucleon collision $\sqrt{s_{\rm{NN}}}$ = 8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals $2.03 < y_{\rm{cms}} < 3.53$ and $-4.46 < y_{\rm{cms}} < -2.96$, down to zero transverse momentum. In this work, results on the inclusive $\Upsilon(1\rm{S})$ production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear Modification Factor shows a suppression of the $\Upsilon(1\rm{S})$ yields with respect to pp collisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the $\Upsilon(2\rm{S})$ nuclear Modification Factor is also evaluated, suggesting a suppression similar to that of the $\Upsilon(1\rm{S})$. A first measurement of the $\Upsilon(3\rm{S})$ has also been performed. Finally, results are compared with previous measurements performed by ALICE in p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV and with theoretical calculations
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Measurement of nuclear effects on $\psi\rm{(2S)}$ production in p-Pb collisions at $\sqrt{\textit{s}_{\rm NN}} = 8.16$ TeV
'Springer Science and Business Media LLC', 2020Co-Authors: Acharya Shreyasi, Adamova Dagmar, Aggarwal, Madan Mohan, Aglieri Rinella Gianluca, Agnello Michelangelo, Agrawal Neelima, Ahammed Zubayer, Adler Alexander, Adolfsson Jonatan, Ahmad ShakeelAbstract:International audienceInclusive ψ(2S) production is measured in p-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair $ \sqrt{s_{\mathrm{NN}}} $ = 8.16 TeV, using the ALICE detector at the CERN LHC. The production of ψ(2S) is studied at forward (2.03 < y$_{cms}$< 3.53) and backward (−4.46 < y$_{cms}$< −2.96) centre-of-mass rapidity and for transverse momentum p$_{T}$< 12 GeV/c via the decay to muon pairs. In this paper, we report the integrated as well as the y$_{cms}$- and p$_{T}$-differential inclusive production cross sections. Nuclear effects on ψ(2S) production are studied via the determination of the nuclear Modification Factor that shows a strong suppression at both forward and backward centre-of-mass rapidities. Comparisons with corresponding results for inclusive J/ψ show a similar suppression for the two states at forward rapidity (p-going direction), but a stronger suppression for ψ(2S) at backward rapidity (Pb-going direction). As a function of p$_{T}$, no clear dependence of the nuclear Modification Factor is found. The relative size of nuclear effects on ψ(2S) production compared to J/ψ is also studied via the double ratio of production cross sections [σ$_{ψ(2S)}$/σ$_{J/ψ}$]pPb/[σ$_{ψ(2S)}$/σ$_{J/ψ}$]$_{pp}$ between p-Pb and pp collisions. The results are compared with theoretical models that include various effects related to the initial and final state of the collision system and also with previous measurements at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV.[graphic not available: see fulltext
Pierre Vande Vyvre - One of the best experts on this subject based on the ideXlab platform.
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rapidity and transverse momentum dependence of the inclusive j mathbf psi nuclear Modification Factor in p pb collisions at mathbf sqrt textit s _ nn 5 02 tev
Journal of High Energy Physics, 2015Co-Authors: J Adam, L D Hanratty, Jovan Milosevic, M Bregant, M Marchisone, E Garciasolis, Ernesto Calvo Villar, R Majka, S G Weber, Pierre Vande VyvreAbstract:We have studied the transverse-momentum ($p_{\rm T}$) dependence of the inclusive J/$\psi$ production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in three center-of-mass rapidity ($y_{\rm cms}$) regions, down to zero $p_{\rm T}$. Results in the forward and backward rapidity ranges ($2.03 < y_{\rm cms} < 3.53$ and $-4.46
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transverse momentum distribution and nuclear Modification Factor of charged particles in p pb collisions at sqrt s_ nn 5 02 tev
Physical Review Letters, 2012Co-Authors: B Abelev, L D Hanratty, Francesco Prino, J Sarkamo, Jovan Milosevic, M Bregant, M Marchisone, Pierre Vande Vyvre, C Petta, Pedro Ladron De GuevaraAbstract:The transverse momentum (pT) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) p+Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The pT spectra measured near central rapidity in the range 0.5