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The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy root sNN = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production
B. Abelev, J. Adam, D. Adamová, M. M. Aggarwal, M. Agnello, A. Agostinelli, et al. (2014). Suppression of ψ(2S) production in p-Pb collisions at sqrt(sNN) = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 1412(12), 1-25 [10.1007/JHEP12(2014)073].
Suppression of ψ(2S) production in p-Pb collisions at sqrt(sNN) = 5.02 TeV
B. Abelev;J. Adam;D. Adamová;M. M. Aggarwal;M. Agnello;A. Agostinelli;N. Agrawal;Z. Ahammed;N. Ahmad;I. Ahmed;S. U. Ahn;S. A. Ahn;I. Aimo;S. Aiola;M. Ajaz;A. Akindinov;S. N. Alam;D. Aleksandrov;B. Alessandro;D. Alexandre;ALICI, ANDREA;A. Alkin;J. Alme;T. Alt;S. Altinpinar;I. Altsybeev;C. Alves Garcia Prado;C. Andrei;A. Andronic;V. Anguelov;J. Anielski;T. Antičić;F. Antinori;P. Antonioli;L. Aphecetche;H. Appelshäuser;ARCELLI, SILVIA;N. Armesto;R. Arnaldi;T. Aronsson;I. C. Arsene;M. Arslandok;A. Augustinus;R. Averbeck;T. C. Awes;M. D. Azmi;M. Bach;A. Badalà;Y. W. Baek;S. Bagnasco;R. Bailhache;R. Bala;A. Baldisseri;F. Baltasar Dos Santos Pedrosa;R. C. Baral;R. Barbera;F. Barile;G. G. Barnaföldi;L. S. Barnby;V. Barret;J. Bartke;BASILE, MAURIZIO;N. Bastid;S. Basu;B. Bathen;G. Batigne;A. Batista Camejo;B. Batyunya;P. C. Batzing;C. Baumann;I. G. Bearden;H. Beck;C. Bedda;N. K. Behera;I. Belikov;BELLINI, FRANCESCA;R. Bellwied;E. Belmont Moreno;R. Belmont;V. Belyaev;G. Bencedi;S. Beole;I. 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2014
Abstract
The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy root sNN = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production
B. Abelev, J. Adam, D. Adamová, M. M. Aggarwal, M. Agnello, A. Agostinelli, et al. (2014). Suppression of ψ(2S) production in p-Pb collisions at sqrt(sNN) = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 1412(12), 1-25 [10.1007/JHEP12(2014)073].
B. Abelev; J. Adam; D. Adamová; M. M. Aggarwal; M. Agnello; A. Agostinelli; N. Agrawal; Z. Ahammed; N. Ahmad; I. Ahmed; S. U. Ahn; S. A. Ahn; I. Aimo;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/429388
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simulazione ASN
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