Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment

G. Aad; Z. Barnovska; N. Berger; M. Delmastro; L. Di Ciaccio; S. Elles; K. Grevtsov; T. Guillemin; T. Hryn’ova; S. Jézéquel; I. Koletsou; R. Lafaye; J. Levêque; P. Mastrandea; G. Sauvage; E. Sauvan; O. Simard; B.H. Smart; T. Todorov; I. Wingerter-Seez; E. Yatsenko; D. Boumediene; E. Busato; D. Calvet; S. Calvet; A.R. Chomont; J. Donini; Ph. Gris; R. Madar; D. Pallin; S.M. Romano Saez; C. Santoni; D. Simon; F. Vazeille; S. Albrand; S. Berlendis; C. Camincher; J. Collot; S. Crépé-Renaudin; P.A. Delsart; C. Gabaldon; M.H. Genest; P.O.J. Gradin; J.Y. Hostachy; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; E. Petit; J. Stark; B. Trocmé; M. Wu; M.K. Ayoub; A. Bassalat; S. Binet; C. Becot; C. Bourdarios; J.B. de Vivie De Regie; D. Delgove; L. Duflot; M. Escalier; L. Fayard; D. Fournier; E.L. Gkougkousis; J.-F. Grivaz; F. Hariri; S. Henrot-Versille; J. Hrivnac; L. Iconomidou-Fayard; M. Kado; A. Lounis; N. Makovec; N. Morange; C. Nellist; P. Petroff; L. Poggioli; P. Puzo; A. Renaud; G. Rybkin; D. Rousseau; A.C. Schaffer; L. Serin; E. Scifo; S. Simion; R. Tanaka; D. Zerwas; Zhongkai Zhang; Y. Zhao; G. Rahal; M. Alstaty; M. Barbero; A. Calandri; T.P. Calvet; Y. Coadou; C. Diaconu; S. Diglio; F. Djama; V. Ellajosyula; L. Feligioni; J. Gao; A. Hadef; G.D. Hallewell; F. Hubaut; S.J. Kahn; E. B. F. G. Knoops; E. Le Guirriec; J. Liu; K. Liu; D. Madaffari; E. Monnier; S. Muanza; E. Nagy; P. Pralavorio; Y. Rodina; A. Rozanov; M. Talby; T. Theveneaux-Pelzer; R.E. Ticse Torres; S. Tisserant; J. Toth; F. Touchard; L. Vacavant; Chen Wang

doi:10.1016/j.physletb.2016.10.053

Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment

G. Aad ¹ Z. Barnovska ² N. Berger ² M. Delmastro ² L. Di Ciaccio ² S. Elles ² K. Grevtsov ² T. Guillemin ² T. Hryn’ova ² S. Jézéquel ² I. Koletsou ² R. Lafaye ² J. Levêque ² P. Mastrandea ² G. Sauvage ² E. Sauvan ² O. Simard ² B.H. Smart ² T. Todorov ² I. Wingerter-Seez ² E. Yatsenko ² D. Boumediene ³ E. Busato ³ D. Calvet ³ S. Calvet ³ A.R. Chomont ³ J. Donini ³ Ph. Gris ³ R. Madar ³ D. Pallin ³ S.M. Romano Saez ³ C. Santoni ³ D. Simon ³ F. Vazeille ³ S. Albrand ⁴ S. Berlendis ⁴ C. Camincher ⁴ J. Collot ⁴ S. Crépé-Renaudin ⁴ P.A. Delsart ⁴ C. Gabaldon ⁴ M.H. Genest ⁴ P.O.J. Gradin ⁴ J.Y. Hostachy ⁴ F. Ledroit-Guillon ⁴ A. Lleres ⁴ A. Lucotte ⁴ F. Malek ⁴ E. Petit ⁴ J. Stark ⁴ B. Trocmé ⁴ M. Wu ⁴ M.K. Ayoub ⁵ A. Bassalat ⁵ S. Binet ⁵ C. Becot C. Bourdarios ⁵ J.B. de Vivie De Regie ⁵ D. Delgove ⁵ L. Duflot ⁵ M. Escalier ⁵ L. Fayard ⁵ D. Fournier ⁵ E.L. Gkougkousis ⁵ J.-F. Grivaz ⁵ F. Hariri ⁵ S. Henrot-Versille ⁵ J. Hrivnac ⁵ L. Iconomidou-Fayard ⁵ M. Kado ⁵ A. Lounis ⁵ N. Makovec ⁵ N. Morange ⁵ C. Nellist ⁵ P. Petroff ⁵ L. Poggioli ⁵ P. Puzo ⁵ A. Renaud ⁵ G. Rybkin ⁵ D. Rousseau ⁵ A.C. Schaffer ⁵ L. Serin ⁵ E. Scifo ⁵ S. Simion ⁵ R. Tanaka ⁵ D. Zerwas ⁵ Zhongkai Zhang ⁵ Y. Zhao ⁵ G. Rahal ⁶ M. Alstaty ¹ M. Barbero ¹ A. Calandri ¹ T.P. Calvet ¹ Y. Coadou ¹ C. Diaconu ¹ S. Diglio ¹ F. Djama ¹ V. Ellajosyula ¹ L. Feligioni ¹ J. Gao ¹ A. Hadef ¹ G.D. Hallewell ¹ F. Hubaut ¹ S.J. Kahn ¹ E. B. F. G. Knoops ¹ E. Le Guirriec ¹ J. Liu ¹ K. Liu D. Madaffari ¹ E. Monnier ¹ S. Muanza ¹ E. Nagy ¹ P. Pralavorio ¹ Y. Rodina ¹ A. Rozanov ¹ M. Talby ¹ T. Theveneaux-Pelzer ¹ R.E. Ticse Torres ¹ S. Tisserant ¹ J. Toth ¹ F. Touchard ¹ L. Vacavant ¹ Chen Wang ¹

1 CPPM - Centre de Physique des Particules de Marseille

2 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules

3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

5 LAL - Laboratoire de l'Accélérateur Linéaire

6 CC-IN2P3 - Centre de Calcul de l'IN2P3

Abstract : Measurements of the per-event charged-particle yield as a function of the charged-particle transverse momentum and rapidity are performed using $p+$Pb collision data collected by the ATLAS experiment at the LHC at a centre-of-mass energy of $\sqrt{s_{NN}}=5.02$ TeV. Charged particles are reconstructed over pseudorapidity $|\eta|<2.3$ and transverse momentum between $0.1$ GeV and $22$ GeV in a dataset corresponding to an integrated luminosity of $1$ $\mu b^{-1}$. The results are presented in the form of charged-particle nuclear modification factors, where the $p+$Pb charged-particle multiplicities are compared between central and peripheral $p+$Pb collisions as well as to charged-particle cross sections measured in pp collisions. The $p+$Pb collision centrality is characterized by the total transverse energy measured in $-4.9<\eta<-3.1$, which is in the direction of the outgoing lead beam. Three different estimations of the number of nucleons participating in the $p+$Pb collision are carried out using the Glauber model and two Glauber-Gribov colour-fluctuation extensions to the Glauber model. The values of the nuclear modification factors are found to vary significantly as a function of rapidity and transverse momentum. A broad peak is observed for all centralities and rapidities in the nuclear modification factors for charged-particle transverse momentum values around $3$ GeV. The magnitude of the peak increases for more central collisions as well as rapidity ranges closer to the direction of the outgoing lead nucleus.

Type de document :

Article dans une revue

Physics Letters B, Elsevier, 2016, 763, pp.313-336. 〈10.1016/j.physletb.2016.10.053〉

Domaine :

Physique [physics] / Physique des Hautes Energies - Expérience [hep-ex]

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http://hal.in2p3.fr/in2p3-01319815
Contributeur : Claudine Bombar <>
Soumis le : lundi 23 mai 2016 - 09:49:56
Dernière modification le : lundi 9 avril 2018 - 12:22:07

Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment

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Transverse momentum, rapidity, and centrality dependence of inclusive charged-particle production in $\sqrt{s_{NN}}=5.02$ TeV p+Pb collisions measured by the ATLAS experiment

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