Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment
2017
Аутори
Khachatryan, V.Adžić, Petar
Ćirković, Predrag
Devetak, Damir
Milošević, Jovan
Reković, Vladimir
Đorđević, Miloš
Milenović, Predrag
Остала ауторства
CMS CollaborationCMS Collaboration (ukupan broj autora: 2299)
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The cross section for coherent J/psi photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at root sNN= 2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 mu b(-1), collected during the 2011 PbPb run. The J/psi mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d sigma(Xn)o(n)(coh)/dy(J/psi) = 0.36 +/- 0.04 (stat)+/- 0.04 (syst) mbin the rapidity interval 1.8 LT vertical bar y vertical bar LT 2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0nmeasurement gives a total coherent photoproduction cross section of d sigma(coh/) dy(J/psi) = 1.82 +/- 0.22 (stat)+/- 0.20 (syst)+/- 0.19 (theo) mb. The data strongly disfavorthe impulse approximation model prediction, i...ndicating that nuclear effects are needed to describe coherent J/psi photoproduction in.+ Pbinteractions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing. (C) 2017 The Author(s). Published by Elsevier B.V.
Кључне речи:
CMS / Physics / Heavy ion collisions / Ultra-peripheral collisions / UPC / J/PsiИзвор:
Physics Letters B, 2017, 772, 489-511
DOI: 10.1016/j.physletb.2017.07.001
ISSN: 0370-2693
WoS: 000411369700071
Scopus: 2-s2.0-85030700462
Колекције
Институција/група
VinčaTY - JOUR AU - Khachatryan, V. AU - Adžić, Petar AU - Ćirković, Predrag AU - Devetak, Damir AU - Milošević, Jovan AU - Reković, Vladimir AU - Đorđević, Miloš AU - Milenović, Predrag PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1742 AB - The cross section for coherent J/psi photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at root sNN= 2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 mu b(-1), collected during the 2011 PbPb run. The J/psi mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d sigma(Xn)o(n)(coh)/dy(J/psi) = 0.36 +/- 0.04 (stat)+/- 0.04 (syst) mbin the rapidity interval 1.8 LT vertical bar y vertical bar LT 2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0nmeasurement gives a total coherent photoproduction cross section of d sigma(coh/) dy(J/psi) = 1.82 +/- 0.22 (stat)+/- 0.20 (syst)+/- 0.19 (theo) mb. The data strongly disfavorthe impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent J/psi photoproduction in.+ Pbinteractions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing. (C) 2017 The Author(s). Published by Elsevier B.V. T2 - Physics Letters B T1 - Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment VL - 772 SP - 489 EP - 511 DO - 10.1016/j.physletb.2017.07.001 ER -
@article{ author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag", year = "2017", abstract = "The cross section for coherent J/psi photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at root sNN= 2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 mu b(-1), collected during the 2011 PbPb run. The J/psi mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d sigma(Xn)o(n)(coh)/dy(J/psi) = 0.36 +/- 0.04 (stat)+/- 0.04 (syst) mbin the rapidity interval 1.8 LT vertical bar y vertical bar LT 2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0nmeasurement gives a total coherent photoproduction cross section of d sigma(coh/) dy(J/psi) = 1.82 +/- 0.22 (stat)+/- 0.20 (syst)+/- 0.19 (theo) mb. The data strongly disfavorthe impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent J/psi photoproduction in.+ Pbinteractions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing. (C) 2017 The Author(s). Published by Elsevier B.V.", journal = "Physics Letters B", title = "Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment", volume = "772", pages = "489-511", doi = "10.1016/j.physletb.2017.07.001" }
Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment. in Physics Letters B, 772, 489-511. https://doi.org/10.1016/j.physletb.2017.07.001
Khachatryan V, Adžić P, Ćirković P, Devetak D, Milošević J, Reković V, Đorđević M, Milenović P. Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment. in Physics Letters B. 2017;772:489-511. doi:10.1016/j.physletb.2017.07.001 .
Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment" in Physics Letters B, 772 (2017):489-511, https://doi.org/10.1016/j.physletb.2017.07.001 . .