期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP09(2014)094
关键词
Hadron-Hadron Scattering; B physics
资金
- BMWFW (Austria)
- FWF (Austria)
- FNRS (Belgium)
- FWO (Belgium)
- CNPq (Brazil)
- CAPES (Brazil)
- FAPERJ (Brazil)
- FAPESP (Brazil)
- MES (Bulgaria)
- CERN
- CAS (China)
- MoST (China)
- NSFC (China)
- COL-CIENCIAS (Colombia)
- MSES (Croatia)
- CSF (Croatia)
- RPF (Cyprus)
- MoER (Estonia)
- ERC (Estonia)
- IUT (Estonia)
- ERDF (Estonia)
- Academy of Finland (Finland)
- MEC (Finland)
- HIP (Finland)
- CEA (France)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- GSRT (Greece)
- OTKA (Hungary)
- NIH (Hungary)
- DAE (India)
- DST (India)
- IPM (Iran)
- SFI (Ireland)
- INFN (Italy)
- NRF (Republic of Korea)
- WCU (Republic of Korea)
- LAS (Lithuania)
- MOE (Malaysia)
- UM (Malaysia)
- CINVESTAV (Mexico)
- CONACYT (Mexico)
- SEP (Mexico)
- UASLP-FAI (Mexico)
- MBIE (New Zealand)
- PAEC (Pakistan)
- MSHE (Poland)
- NSC (Poland)
- FCT (Portugal)
- JINR (Dubna)
- MON (Russia)
- RosAtom (Russia)
- RAS (Russia)
- RFBR (Russia)
- MESTD (Serbia)
- SEIDI (Spain)
- CPAN (Spain)
- Swiss Funding Agencies (Switzerland)
- MST (Taipei)
- ThEPCenter (Thailand)
- IPST (Thailand)
- STAR (Thailand)
- NSTDA (Thailand)
- TUBITAK (Turkey)
- TAEK (Turkey)
- NASU (Ukraine)
- SFFR (Ukraine)
- STFC (United Kingdom)
- DOE (U.S.A.)
- NSF (U.S.A.)
- STFC [ST/G502347/1, ST/L00609X/1, ST/M002020/1, ST/K001639/1, ST/F006748/1, ST/H000925/2, ST/H000925/1, ST/L005603/1, PP/E002803/1, ST/I000410/1, ST/I005912/1, ST/J005665/1, ST/J004871/1, ST/F007094/1, ST/J004901/1, ST/K003542/1, ST/I000305/1, ST/I003622/1, ST/L006340/1, ST/I002200/1, ST/J005479/1, ST/I505572/1, ST/K003844/1, ST/K001531/1, ST/K001604/1, ST/H00081X/2] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H000925/1, ST/K001604/1 MICE/UKNF, ST/K001604/1 GRIDPP, ST/K001604/1 LHCb Upgrades, ST/K001604/1 DMUK, ST/G502347/1, CMS, ST/L00609X/1 GRIDPP, ST/J004871/1, ST/K001604/1 CMS Upgrade, ST/K001256/1, ST/K003542/1 GRID PP, ST/K001604/1 SuperNEMO, ST/J005665/1, ST/K001604/1 LHCb, ST/L00609X/1, ST/I000410/1, ST/I505572/1, PP/E002803/1, ST/I000305/1, ST/J004901/1, ST/L005603/1, ST/K003542/1, ST/K003844/1, ST/L006340/1, ST/H000925/2, ST/K001604/1 T2K, ST/J005479/1, ST/K001604/1, ST/F007094/1, ST/I003622/1 GRIDPP, ST/I003622/1, ST/I005912/1, GRIDPP, ST/K003844/1 GRIDPP, ST/I005912/1 GRIDPP, ST/M002020/1, ST/I002200/1, ST/K001639/1, ST/K001531/1, ST/F006748/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1211067, 1151640, 1120138, 0906479] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1314131, 1306951, 1205960] Funding Source: National Science Foundation
Production of prompt J/psi meson pairs in proton-proton collisions at root s = 7 TeV is measured with the CMS experiment at the LHC in a data sample corresponding to an integrated luminosity of about 4.7 fb(-1). The two J/psi mesons are fully reconstructed via their decays into mu(+)mu(-) pairs. This observation provides for the first time access to the high-transverse-momentum region of J/psi pair production where model predictions are not yet established. The total and differential cross sections are measured in a phase space defined by the individual J/psi transverse momentum (p(T)(J/psi)) and rapidity (vertical bar y(J/psi)vertical bar): vertical bar y(J/psi)vertical bar < 1.2 for p(T)(J/psi) > 6.5 GeV/c; 1.2 < vertical bar y(J/psi)vertical bar < 1.43 for a pT threshold that scales linearly with vertical bar y(J/psi)vertical bar from 6.5 to 4.5 GeV/c; and 1.43 < vertical bar y(J/psi)vertical bar < 2.2 for p(T)(J/psi) > 4.5 GeV/c. The total cross section, assuming unpolarized prompt J/psi pair production is 1.49 +/- 0.07 (stat) +/- 0.13 (syst) nb. Different assumptions about the J/psi polarization imply modifications to the cross section ranging from -31% to +27%.
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