期刊
PHYSICS LETTERS B
卷 718, 期 3, 页码 795-814出版社
ELSEVIER
DOI: 10.1016/j.physletb.2012.11.025
关键词
CMS; Physics; Heavy ions
资金
- BMWF
- FWF (Austria)
- FNRS
- FWO (Belgium)
- CNPq
- CAPES
- FAPERJ
- FAPESP (Brazil)
- MEYS (Bulgaria)
- CERN
- CAS
- MoST
- NSFC (China)
- COLCIENCIAS (Colombia)
- MSES (Croatia)
- RPF (Cyprus)
- MoER [SF0690030s09]
- ERDF (Estonia)
- Academy of Finland
- MEC
- HIP (Finland)
- CEA
- CNRS/IN2P3 (France)
- BMBF
- DFG
- HGF (Germany)
- GSRT (Greece)
- OTKA
- NKTH (Hungary)
- DAE
- DST (India)
- IPM (Iran)
- SFI (Ireland)
- INFN (Italy)
- NRF
- WCU (Republic of Korea)
- LAS (Lithuania)
- CINVESTAV
- CONACYT
- SEP
- UASLP-FAI (Mexico)
- MSI (New Zealand)
- PAEC (Pakistan)
- MSHE
- NSC (Poland)
- FCT (Portugal)
- JINR (Armenia)
- JINR (Belarus)
- JINR (Georgia)
- JINR (Ukraine)
- JINR (AUzbekistan)
- MON
- RosAtom
- RAS
- RFBR (Russia)
- MSTD (Serbia)
- SEIDI
- CPAN (Spain)
- Swiss Funding Agencies (Switzerland)
- NSC (Taipei)
- ThEP
- IPST
- NECTEC (Thailand)
- TUBITAK
- TAEK (Turkey)
- NASU (Ukraine)
- STFC (United Kingdom)
- DOE
- NSF (USA)
- STFC [ST/I005912/1, ST/H00081X/2, ST/I505572/1, ST/F007434/1, ST/F007094/1, ST/J005665/1, ST/K001604/1, ST/I000410/1, ST/I505580/1, ST/G502347/1, ST/L00609X/1, ST/K001639/1, ST/F006748/1, ST/H000925/1, ST/K003844/1, ST/J004901/1, ST/I002200/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/I005912/1 GRIDPP, ST/I505580/1, ST/H000925/1, ST/K003844/1 GRIDPP, GRIDPP, ST/I005912/1, ST/I003622/1 GRIDPP, ST/F007094/1, ST/K001604/1, ST/K001604/1 T2K, ST/K003844/1, ST/J004901/1, ST/I505572/1, ST/I000410/1, ST/L00609X/1, ST/K001604/1 LHCb, ST/J005665/1, ST/K001604/1 SuperNEMO, ST/K001604/1 CMS Upgrade, ST/I002200/1, ST/K001639/1, PP/D004284/1, ST/F006748/1, CMS, ST/G502347/1, ST/F007434/1, ST/K001604/1 DMUK, ST/K001604/1 LHCb Upgrades, ST/K001604/1 GRIDPP, ST/K001604/1 MICE/UKNF, ST/L00609X/1 GRIDPP] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1151640] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1211067, 1205960, 0969555, 0855637, 1067907] Funding Source: National Science Foundation
Results on two-particle angular correlations for charged particles emitted in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are presented. The analysis uses two million collisions collected with the CMS detector at the LHC. The correlations are studied over a broad range of pseudorapidity, eta, and full azimuth, phi, as a function of charged particle multiplicity and particle transverse momentum, p(T). In high-multiplicity events, a long-range (2 < vertical bar Delta eta vertical bar < 4), near-side (Delta phi approximate to 0) structure emerges in the two-particle Delta eta-Delta phi correlation functions. This is the first observation of such correlations in proton-nucleus collisions, resembling the ridge-like correlations seen in high-multiplicity pp collisions at root s = 7 TeV and in AA collisions over a broad range of center-of-mass energies. The correlation strength exhibits a pronounced maximum in the range of p(T) = 1-1.5 GeV/c and an approximately linear increase with charged particle multiplicity for high-multiplicity events. These observations are qualitatively similar to those in pp collisions when selecting the same observed particle multiplicity, while the overall strength of the correlations is significantly larger in pPb collisions. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
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