Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions
The production of Y (1S), Y (2S), and Y (3S) is investigated in pPb and pp collisions at centre-of-mass energies per nucleon pair of 5.02 TeV and 2.76 TeV, respectively. The datasets correspond to integrated luminosities of about 31 nb−1 (pPb) and 5.4 pb−1 (pp), collected in 2013 by the CMS experime...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag/International School for Advanced Studies (SISSA)
2014
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| Online Access: | http://hdl.handle.net/1721.1/88701 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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| author | Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco CMS Collaboration Apyan, Aram Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Yang, Mingming Yoon, A. S. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco CMS Collaboration Apyan, Aram Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Yang, Mingming Yoon, A. S. |
| author_sort | Busza, Wit |
| collection | MIT |
| description | The production of Y (1S), Y (2S), and Y (3S) is investigated in pPb and pp collisions at centre-of-mass energies per nucleon pair of 5.02 TeV and 2.76 TeV, respectively. The datasets correspond to integrated luminosities of about 31 nb−1 (pPb) and 5.4 pb−1 (pp), collected in 2013 by the CMS experiment at the LHC. Upsilons that decay into muons are reconstructed within the rapidity interval |y CM| < 1.93 in the nucleon-nucleon centre-of-mass frame. Their production is studied as a function of two measures of event activity, namely the charged-particle multiplicity measured in the pseudorapidity interval |η| < 2.4, and the sum of transverse energy deposited at forward pseudorapidity, 4.0 < |η| < 5.2. The Y cross sections normalized by their event activity integrated values, Y (nS)/〈 Y (nS)〉, are found to rise with both measures of the event activity in pp and pPb. In both collision systems, the ratios of the excited to the ground state cross sections, Y (nS)/ Y (1S), are found to decrease with the charged-particle multiplicity, while as a function of the transverse energy the variation is less pronounced. The event activity integrated double ratios, [ Y (nS)/ Y (1S)]pPb /[ Y (nS)/ Y (1S)]pp, are also measured and found to be 0.83 ± 0.05 (stat.) ± 0.05 (syst.) and 0.71 ± 0.08 (stat.) ± 0.09 (syst.) for Y (2S) and Y (3S), respectively. |
| first_indexed | 2024-09-23T10:00:54Z |
| format | Article |
| id | mit-1721.1/88701 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:00:54Z |
| publishDate | 2014 |
| publisher | Springer-Verlag/International School for Advanced Studies (SISSA) |
| record_format | dspace |
| spelling | mit-1721.1/887012023-02-26T10:15:06Z Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco CMS Collaboration Apyan, Aram Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Yang, Mingming Yoon, A. S. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Levin, Andrew Michael Luckey, P. David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E. Roland, Gunther M. Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, M. Yoon, Andrew Zanetti, Marco Zhukova, Victoria Apyan, Aram The production of Y (1S), Y (2S), and Y (3S) is investigated in pPb and pp collisions at centre-of-mass energies per nucleon pair of 5.02 TeV and 2.76 TeV, respectively. The datasets correspond to integrated luminosities of about 31 nb−1 (pPb) and 5.4 pb−1 (pp), collected in 2013 by the CMS experiment at the LHC. Upsilons that decay into muons are reconstructed within the rapidity interval |y CM| < 1.93 in the nucleon-nucleon centre-of-mass frame. Their production is studied as a function of two measures of event activity, namely the charged-particle multiplicity measured in the pseudorapidity interval |η| < 2.4, and the sum of transverse energy deposited at forward pseudorapidity, 4.0 < |η| < 5.2. The Y cross sections normalized by their event activity integrated values, Y (nS)/〈 Y (nS)〉, are found to rise with both measures of the event activity in pp and pPb. In both collision systems, the ratios of the excited to the ground state cross sections, Y (nS)/ Y (1S), are found to decrease with the charged-particle multiplicity, while as a function of the transverse energy the variation is less pronounced. The event activity integrated double ratios, [ Y (nS)/ Y (1S)]pPb /[ Y (nS)/ Y (1S)]pp, are also measured and found to be 0.83 ± 0.05 (stat.) ± 0.05 (syst.) and 0.71 ± 0.08 (stat.) ± 0.09 (syst.) for Y (2S) and Y (3S), respectively. United States. Dept. of Energy National Science Foundation (U.S.) 2014-08-14T19:51:57Z 2014-08-14T19:51:57Z 2014-04 2013-12 Article http://purl.org/eprint/type/JournalArticle 1029-8479 http://hdl.handle.net/1721.1/88701 Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions.” J. High Energ. Phys. 2014, no. 4 (April 2014). https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 en_US http://dx.doi.org/10.1007/jhep04(2014)103 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag/International School for Advanced Studies (SISSA) Springer-Verlag |
| spellingShingle | Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco CMS Collaboration Apyan, Aram Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Yang, Mingming Yoon, A. S. Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title | Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title_full | Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title_fullStr | Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title_full_unstemmed | Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title_short | Event activity dependence of Υ(nS) production in √sNN = 5.02 TeV pPb and √s = 2.76 TeV pp collisions |
| title_sort | event activity dependence of υ ns production in √snn 5 02 tev ppb and √s 2 76 tev pp collisions |
| url | http://hdl.handle.net/1721.1/88701 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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