A Measurement of the ψ′ to J/ψ production ratio in 920 GeV proton-nucleus interactions

Abt, I.; Adams, M. R.; Agari, M.; Albrecht, H.; Aleksandrov, A.; Amaral, Vasco; Amorim, A.; Aplin, S.; Aushev, V.; Bagaturia, Y.; Balagura, V.; Bargiotti, M.; Barsukova, O.; Bastos, J.; Batista, J.; Bauer, C.; Bauer, Th.; Bel'kov, A.A.; Belotelov, I.; Bertin, A.; Bobchenko, B.; Böcker, M.; Bogatyrev, A.; Böhm, G.; Bräuer, M.; Bruinsma, M.; Bruschi, M.; Buchholz, P.; Buran, T.; Carvalho, J.; Conde, P.; Cruse, C.; Dam, M.; Danielsen, K.M.; Danilov, M.; Castro, S. De; Deppe, H.; Dong, X.; Dreis, H. B.; Egorytchev, V.; Ehret, K.; Eisele, F.; Emeliyanov, D.; Essenov, S.; Fabbri, L.; Faccioli, P.; Feuerstack-Raible, M.; Flammer, J.; Fominykh, B.; Funcke, M.; Garrido, Ll.; Gellrich, A.; Giacobbe, B.; Gläß, J.; Goloubkov, D.; Golubkov, D.; Golutvin, A.; Golutvin, I.; Gorbounov, I.; Gorišek, A.; Gouchtchine, O.; Goulart, D. C.; Gradl, S.; Gradl, W.; Grimaldi, F.; Groth-Jensen, J.; Guilitsky, Y.; Hansen, J. D.; Hernández, J. M.; Hofmann, W.; Hohlmann, M.; Hott, T.; Hulsbergen, W.; Husemann, U.; Igonkina, O.; Ispiryan, M.; Jagla, T.; Jiang, C. H.; Kapitza, H.; Karabekyan, S.; Karpenko, N.N.; Keller, S.; Keßler, J.; Khasanov, F.; Kiryushin, Yu.T.; Kisel, I.; Klinkby, E. B.; Knöpfle, K. T.; Kolanoski, H.; Korpar, S.; Krauss, C. B.; Kreuzer, P.; Križan, P.; Krücker, D.; Küpper, Sebastian; Kvaratskheliia, T.; Lanev, A.; Lau, K.; Lewendel, B.; Löhse, T.; Lomonosov, B.; Männer, Reinhard; Mankel, R.; Masciocchi, S.; Massa, I.; Matchikhilian, I.; Medin, G.; Medinnis, M.; Mevius, M.; Michetti, A.; Mikhailov, Yu.V.; Mizuk, R.; Mureşan, R.; Nedden, M. zur; Negodaev, M.; Nörenberg, M.; Nowak, S.; Vera, María Teresa Núñez Pardo de; Ouchrif, M.; Ould-Saada, F.; Aranda, C. Padilla; Peralta, D.; Pernack, R.; Pestotnik, R.; Petersen, B. A.; Piccinini, M.; Pleier, M. A.; Poli, M.; Popov, V.; Pose, D.; Prystupa, S.; Pugatch, V.; Pylypchenko, Y.; Pyrlik, J.; Reeves, K.; Reßing, D.; Rick, H.; Riu, I.; Robmann, P.; Rostovtseva, I.; Rybnikov, V.; Sanchez, F. J. Munoz; Sbrizzi, A.; Schmelling, M.; Schmidt, B.; Schreiner, A.; Schröder, H.; Schwanke, U.; Schwartz, A. J.; Schwarz, A. S.; Schwenninger, B.; Schwingenheuer, B.; Sciacca, F. G.; Semprini‐Cesari, N.; Shuvalov, S.; Silva, L.; Sözüer, L.; Solunin, S.; Somov, A.; Somov, S.; Spengler, J.; Spighi, R.; Спиридонов, А.; Stanovnik, A.; Starič, M.; Stegmann, C.; Subramania, Halasya Siva; Symalla, M.; Tikhomirov, I.; Titov, M.; Tsakov, I.; Uwer, U.; Eldik, C. van; Vassiliev, Y.; Villa, M.; Vitale, A.; Vukotić, I.; Wahlberg, H.; Walenta, A.H.; Walter, Michael; Wang, J.J.; Wegener, D.; Werthenbach, U.; Wolters, H.; Wurth, R.; Wurz, A.; Zaitsev, Yu.; Zavertyaev, M.; Zeuner, T.; Zhelezov, A.; Zheng, Z. P.; Zimmermann, R.; Živko, T.; Zoccoli, À.

doi:10.1140/epjc/s10052-006-0139-9

Cited by 52 publications

(40 citation statements)

References 51 publications

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“…However, the same experiment also detected a significant suppression of both states (although not as strong as in Pb-Pb) in proton-nucleus (p-A) collisions [16], where no QGP formation was expected. The same observation was made by other fixed-target experiments studying p-A collisions at Fermilab (E866 [17]) and HERA (HERA-B [18]). It was indeed realized that the charmonium yields are also sensitive to the presence of cold nuclear matter (CNM) in the target nucleus, and various mechanisms (nuclear parton shadowing [19], cc break-up via interaction with nucleons [20][21][22], initial/final state energy loss [23]) were taken into account in order to describe experimental observations.…”

Section: Jhep12(2014)073supporting

confidence: 78%

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Abelev¹,

Adam²,

Adamová³

et al. 2014

J. High Energ. Phys.

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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 √ s NN = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < y cms < 3.53) and backward (−4.46 < y cms < −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σ ψ(2S) , both integrated and as a function of the transverse momentum p T , for the two y cms 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 [σ ψ(2S) /σ J/ψ ] pPb /[σ ψ(2S) /σ J/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.

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Section: Jhep12(2014)073supporting

confidence: 78%

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Abelev¹,

Adam²,

Adamová³

et al. 2014

J. High Energ. Phys.

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“…It is about 3.5% at p T ≈ 6.8 GeV/c with a total systematic uncertainty of about 18%. Compared with other measurements at different colliding energies for p + p or p + A systems, the current measurement follows the trend of p T dependence and shows no colliding energy dependence [5,6,7].…”

Section: Inclusive Cross Sectionsupporting

confidence: 38%

Measurement of J/ψ production in p + p collisions at s=500 GeV at STAR experiment

2016

Nuclear and Particle Physics Proceedings

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Quarkonium measurements in heavy-ion collisions play an essential role in understanding the hot, dense medium created in such collisions. As a reference, their production mechanism in p + p collisions needs to be thoroughly understood. In this paper, we report the measurement of inclusive cross section of J/ψ with transverse momentum (p T ) above 4 GeV/c at mid-rapidity in p + p collisions at √ s = 500 GeV by the STAR experiment. The ratio of the yield of ψ(2S ) to J/ψ integrated over 4 < p T < 12 GeV/c is also presented. Furthermore, the J/ψ yields are studied in different event multiplicity bins in different J/ψ p T regions, where the low p T measurement is enabled by the newly installed Muon Telescope Detector. A strong increase of the relative J/ψ yield with the event multiplicity is observed for all p T with significant p T dependence.

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“…We see that at forward rapidity, the double ratio is consistent with unity in all three collision systems, indicating that any possible nuclear effects on the two charmonium states are comparable. Because these states are not fully formed until after they exit the nucleus, the fact that any nuclear effects have an equal magnitude Comparison of world data on the ratio of ψ(2S)/ψ(1S) mesons as a function of pT [29,40,[43][44][45], along with a calculation from a color evaporation model (CEM) at √ s=200 GeV [25].…”

Section: Resultsmentioning

confidence: 99%

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C

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Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p, p+Al, p+Au, and The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and 3 He+Au collisions at √ s N N = 200 GeV over the forward and backward rapidity intervals 1.2 < |y| < 2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or 3 He-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to breakup of the weakly-bound ψ(2S) through final state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.

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A Measurement of the ψ′ to J/ψ production ratio in 920 GeV proton-nucleus interactions

Cited by 52 publications

References 51 publications

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Measurement of J/ψ production in p + p collisions at s=500 GeV at STAR experiment

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C

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A Measurement of the ψ′ to J/ψ production ratio in 920 GeV proton-nucleus interactions

Cited by 52 publications

References 51 publications

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Suppression of ψ(2S) production in p-Pb collisions at s N N $$ \sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV

Measurement of J/ψ production in p + p collisions at s=500 GeV at STAR experiment

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in Adare1, Aidala2, Ajitanand3 et al. 2017Phys. Rev. C

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Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C