The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Albert M Sirunyan - One of the best experts on this subject based on the ideXlab platform.
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pseudorapidity distributions of charged Hadrons in xenon xenon collisions at snn 5 44 tev
Physics Letters B, 2019Co-Authors: Albert M Sirunyan, Robin Erbacher, C Carrillo A Montoya, Wagner Carvalho, Maciej Gorski, Danek Kotlinski, Balazs Ujvari, Sertac Ozturk, S Muthumuni, Richard LanderAbstract:Abstract Measurements of the pseudorapidity distributions of charged Hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of s NN = 5.44 TeV are presented. The measurements are based on data collected by the CMS experiment at the LHC. The yield of primary charged Hadrons produced in xenon-xenon collisions in the pseudorapidity range | η | 3.2 is determined using the silicon pixel detector in the CMS tracking system. For the 5% most central collisions, the charged-hadron pseudorapidity density in the midrapidity region | η | 0.5 is found to be 1187 ± 36 (syst) , with a negligible statistical uncertainty. The rapidity distribution of charged Hadrons is also presented in the range | y | 3.2 and is found to be independent of rapidity around y = 0 . Existing Monte-Carlo event generators are unable to simultaneously describe both results. Comparisons of charged-hadron multiplicities between xenon-xenon and lead-lead collisions at similar collision energies show that particle production at midrapidity is strongly dependent on the collision geometry in addition to the system size and collision energy.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, M. Drag-icevic, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, J. EröAbstract:A bstractThe pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm|
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pseudorapidity distributions of charged Hadrons in proton lead collisions at s n n 5 02 sqrt s_ mathrm nn 5 02 and 8 16 tev
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm| < 0.5 are 17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV
JHEP, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Wolfgang Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $ \sqrt{s_{\mathrm{NN}}}=5.02 $ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |η$_{lab}$| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |η$_{cm}$| < 0.5, the average charged-hadron multiplicity densities 〈dN$_{ch}$/dη$_{cm}$〉$_{|η}_{cm|}$
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pseudorapidity distribution of charged Hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged Hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived Hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
Martin Flechl - One of the best experts on this subject based on the ideXlab platform.
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pseudorapidity distributions of charged Hadrons in proton lead collisions at s n n 5 02 sqrt s_ mathrm nn 5 02 and 8 16 tev
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm| < 0.5 are 17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV
JHEP, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Wolfgang Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $ \sqrt{s_{\mathrm{NN}}}=5.02 $ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |η$_{lab}$| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |η$_{cm}$| < 0.5, the average charged-hadron multiplicity densities 〈dN$_{ch}$/dη$_{cm}$〉$_{|η}_{cm|}$
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pseudorapidity distribution of charged Hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged Hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived Hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
Tobias Bergauer - One of the best experts on this subject based on the ideXlab platform.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, M. Drag-icevic, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, J. EröAbstract:A bstractThe pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm|
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pseudorapidity distributions of charged Hadrons in proton lead collisions at s n n 5 02 sqrt s_ mathrm nn 5 02 and 8 16 tev
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm| < 0.5 are 17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV
JHEP, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Wolfgang Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $ \sqrt{s_{\mathrm{NN}}}=5.02 $ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |η$_{lab}$| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |η$_{cm}$| < 0.5, the average charged-hadron multiplicity densities 〈dN$_{ch}$/dη$_{cm}$〉$_{|η}_{cm|}$
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pseudorapidity distribution of charged Hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged Hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived Hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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inclusive b hadron production cross section with muons in pp collisions at sqrt s 7 tev
Journal of High Energy Physics, 2011Co-Authors: V Khachatryan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, W Adam, M Dragicevic, C Fabjan, M Friedl, R Fruhwirth, Vasile Mihai GheteAbstract:A measurement of the b-hadron production cross section in proton-proton collisions at sqrt(s)=7 TeV is presented. The dataset, corresponding to 85 inverse nanobarns, was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. Events are selected by the presence of a muon with transverse momentum greater than 6 GeV with respect to the beam direction and pseudorapidity less than 2.1. The transverse momentum of the muon with respect to the closest jet discriminates events containing b Hadrons from background. The inclusive b-hadron production cross section is presented as a function of muon transverse momentum and pseudorapidity. The measured total cross section in the kinematic acceptance is sigma(pp to b+X to mu + X') =1.32 +/- 0.01 (stat) +/- 0.30 (syst) +/- 0.15 (lumi) microbarns.
Armen Tumasyan - One of the best experts on this subject based on the ideXlab platform.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, M. Drag-icevic, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, J. EröAbstract:A bstractThe pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm|
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pseudorapidity distributions of charged Hadrons in proton lead collisions at s n n 5 02 sqrt s_ mathrm nn 5 02 and 8 16 tev
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm| < 0.5 are 17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV
JHEP, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Wolfgang Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $ \sqrt{s_{\mathrm{NN}}}=5.02 $ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |η$_{lab}$| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |η$_{cm}$| < 0.5, the average charged-hadron multiplicity densities 〈dN$_{ch}$/dη$_{cm}$〉$_{|η}_{cm|}$
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pseudorapidity distribution of charged Hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged Hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived Hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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inclusive b hadron production cross section with muons in pp collisions at sqrt s 7 tev
Journal of High Energy Physics, 2011Co-Authors: V Khachatryan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, W Adam, M Dragicevic, C Fabjan, M Friedl, R Fruhwirth, Vasile Mihai GheteAbstract:A measurement of the b-hadron production cross section in proton-proton collisions at sqrt(s)=7 TeV is presented. The dataset, corresponding to 85 inverse nanobarns, was recorded with the CMS experiment at the LHC using a low-threshold single-muon trigger. Events are selected by the presence of a muon with transverse momentum greater than 6 GeV with respect to the beam direction and pseudorapidity less than 2.1. The transverse momentum of the muon with respect to the closest jet discriminates events containing b Hadrons from background. The inclusive b-hadron production cross section is presented as a function of muon transverse momentum and pseudorapidity. The measured total cross section in the kinematic acceptance is sigma(pp to b+X to mu + X') =1.32 +/- 0.01 (stat) +/- 0.30 (syst) +/- 0.15 (lumi) microbarns.
E. Asilar - One of the best experts on this subject based on the ideXlab platform.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, M. Drag-icevic, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, J. EröAbstract:A bstractThe pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies sNN=5.02$$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm|
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pseudorapidity distributions of charged Hadrons in proton lead collisions at s n n 5 02 sqrt s_ mathrm nn 5 02 and 8 16 tev
Journal of High Energy Physics, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |ηlab| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |ηcm| < 0.5, the average charged-hadron multiplicity densities 〈dNch/dηcm〉|ηcm| < 0.5 are 17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
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Pseudorapidity distributions of charged Hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV
JHEP, 2018Co-Authors: Albert M Sirunyan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Fabio Ambrogi, Armen Tumasyan, Wolfgang Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distributions of charged Hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $ \sqrt{s_{\mathrm{NN}}}=5.02 $ and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged Hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range |η$_{lab}$| < 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range |η$_{cm}$| < 0.5, the average charged-hadron multiplicity densities 〈dN$_{ch}$/dη$_{cm}$〉$_{|η}_{cm|}$
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pseudorapidity distribution of charged Hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, E. Brondolin, E. Asilar, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Waldemar Adam, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged Hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived Hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
