Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV
The spectra of charged particles produced within the pseudorapidity window |η| < 1 at √ sNN = 5.02 TeV are measured using 404 µb −1 of PbPb and 27.4 pb−1 of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0.5 &...
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Springer Verlag
2017
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iium-625962018-06-21T01:34:04Z http://irep.iium.edu.my/62596/ Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV Khachatryan, Vardan Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Aşilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli Q Science (General) QC Physics The spectra of charged particles produced within the pseudorapidity window |η| < 1 at √ sNN = 5.02 TeV are measured using 404 µb −1 of PbPb and 27.4 pb−1 of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0.5 < pT < 400 GeV in pp and 0.7 < pT < 400 GeV in PbPb collisions. The corresponding nuclear modification factor, RAA, is measured in bins of collision centrality. The RAA in the 5% most central collisions shows a maximal suppression by a factor of 7–8 in the pT region of 6–9 GeV. This dip is followed by an increase, which continues up to the highest pT measured, and approaches unity in the vicinity of pT = 200 GeV. The RAA is compared to theoretical predictions and earlier experimental results at lower collision energies. The newly measured pp spectrum is combined with the pPb spectrum previously published by the CMS Collaboration to construct the pPb nuclear modification factor, RpA, up to 120 GeV. For pT > 20 GeV, RpA exhibits weak momentum dependence and shows a moderate enhancement above unity. Springer Verlag 2017-04-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/62596/2/Charged-particle%20nuclear%20modification%20factors%20in%20PbPb_scopus.pdf application/pdf en http://irep.iium.edu.my/62596/13/62596_Charged-particle%20nuclear%20modification%20factors.pdf Khachatryan, Vardan and Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Aşilar, Ece and Bergauer, Thomas and Md. Ali, Mohd. Adli (2017) Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV. Journal of High Energy Physics, 2017 (4). pp. 1-36. ISSN 1029-8479 E-ISSN 1126-6708 https://link.springer.com/article/10.1007%2FJHEP04%282017%29039 10.1007/JHEP04(2017)039 |
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Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
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IIUM Repository |
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Online Access |
| language |
English English |
| topic |
Q Science (General) QC Physics |
| spellingShingle |
Q Science (General) QC Physics Khachatryan, Vardan Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Aşilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| description |
The spectra of charged particles produced within the pseudorapidity window |η| < 1
at √
sNN = 5.02 TeV are measured using 404 µb
−1 of PbPb and 27.4 pb−1
of pp data
collected by the CMS detector at the LHC in 2015. The spectra are presented over the
transverse momentum ranges spanning 0.5 < pT < 400 GeV in pp and 0.7 < pT <
400 GeV in PbPb collisions. The corresponding nuclear modification factor, RAA, is
measured in bins of collision centrality. The RAA in the 5% most central collisions
shows a maximal suppression by a factor of 7–8 in the pT region of 6–9 GeV. This
dip is followed by an increase, which continues up to the highest pT measured, and
approaches unity in the vicinity of pT = 200 GeV. The RAA is compared to theoretical
predictions and earlier experimental results at lower collision energies. The newly
measured pp spectrum is combined with the pPb spectrum previously published by
the CMS Collaboration to construct the pPb nuclear modification factor, RpA, up to
120 GeV. For pT > 20 GeV, RpA exhibits weak momentum dependence and shows a
moderate enhancement above unity. |
| format |
Article |
| author |
Khachatryan, Vardan Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Aşilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli |
| author_facet |
Khachatryan, Vardan Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Aşilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli |
| author_sort |
Khachatryan, Vardan |
| title |
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| title_short |
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| title_full |
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| title_fullStr |
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| title_full_unstemmed |
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV |
| title_sort |
charged-particle nuclear modification factors in pbpb and ppb collisions at √snn=5.02 tev |
| publisher |
Springer Verlag |
| publishDate |
2017 |
| url |
http://irep.iium.edu.my/62596/ http://irep.iium.edu.my/62596/ http://irep.iium.edu.my/62596/ http://irep.iium.edu.my/62596/2/Charged-particle%20nuclear%20modification%20factors%20in%20PbPb_scopus.pdf http://irep.iium.edu.my/62596/13/62596_Charged-particle%20nuclear%20modification%20factors.pdf |
| first_indexed |
2023-09-18T21:28:42Z |
| last_indexed |
2023-09-18T21:28:42Z |
| _version_ |
1777412365216645120 |