期刊
EUROPEAN PHYSICAL JOURNAL C
卷 77, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-017-4644-9
关键词
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资金
- EU-ESF
- Greek NSRF
- ANPCyT, Argentina
- YerPhI, Armenia
- ARC, Australia
- BMWFW, Austria
- FWF, Austria
- ANAS, Azerbaijan
- SSTC, Belarus
- CNPq, Brazil
- FAPESP, Brazil
- NSERC, Canada
- NRC, Canada
- CFI, Canada
- CERN
- CONICYT, Chile
- CAS, China
- MOST, China
- NSFC, China
- COLCIENCIAS, Colombia
- MPO CR, Czech Republic
- VSC CR, Czech Republic
- DNRF, Denmark
- DNSRC, Denmark
- IN2P3-CNRS, France
- CEA-DSM/IRFU, France
- GNSF, Georgia
- BMBF, Germany
- HGF, Germany
- MPG, Germany
- GSRT, Greece
- RGC, Hong Kong SAR, China
- ISF, Israel
- I-CORE, Israel
- Benoziyo Center, Israel
- INFN, Italy
- MEXT, Japan
- JSPS, Japan
- CNRST, Morocco
- FOM, Netherlands
- NWO, Netherlands
- RCN, Norway
- MNiSW, Poland
- NCN, Poland
- FCT, Portugal
- MNE/IFA, Romania
- MES of Russia, Russian Federation
- NRC KI, Russian Federation
- JINR
- MESTD, Serbia
- MSSR, Slovakia
- ARRS, Slovenia
- MIZS, Slovenia
- DST/NRF, South Africa
- MINECO, Spain
- SRC, Sweden
- Wallenberg Foundation, Sweden
- SERI, Geneva, Switzerland
- SNSF, Geneva, Switzerland
- SERI, Cantons of Bern, Switzerland
- MOST, Taiwan
- TAEK, Turkey
- STFC, United Kingdom
- DOE, United States of America
- NSF, United States of America
- BCKDF, Canada
- Canada Council, Canada
- CANARIE, Canada
- CRC, Canada
- Compute Canada, Canada
- FQRNT, Canada
- Ontario Innovation Trust, Canada
- EPLANET, European Union
- ERDF, European Union
- Horizon and Marie Sklodowska-Curie Actions, European Union
- Investissements d'Avenir Labex and Idex, France
- ANR, France
- Region Auvergne and Fondation Partager le Savoir, France
- DFG, Germany
- AvH Foundation, Germany
- BSF
- BRF, Norway
- CERCA Programme Generalitat de Catalunya, Spain
- Generalitat Valenciana, Spain
- Royal Society, United Kingdom
- Leverhulme Trust, United Kingdom
- MSMT CR, Czech Republic
- SNSF, Cantons of Bern, Switzerland
- ERC, European Union
- Science and Technology Facilities Council [1366825, ST/K001361/1, ST/L000997/1, ST/M006417/1, ST/M005437/1, ST/K001329/1 ATLAS, ST/L006162/1, ST/J005533/1, ST/J004804/1, ST/N000234/1, ST/M001431/1, ST/M000753/1, ST/N000277/1, ATLAS, ST/K001329/1, ST/K003666/1, GRIDPP, ST/L001144/1, ST/N000307/1, ST/N000331/1, ST/L005662/1, ST/N000420/1, ST/I005846/1] Funding Source: researchfish
- STFC [ST/K003666/1, ST/M006417/1, ST/L006162/1, ST/I005846/1, ST/J004804/1, ST/J005533/1, ST/N000307/1, ST/M000753/1, ST/L000997/1, ST/N000331/1, ST/N000420/1, ST/K001361/1, ST/N000277/1, ST/N000234/1, ST/M005437/1, ST/K001329/1, ST/M001431/1, ST/L005662/1, ST/L001144/1] Funding Source: UKRI
- ICREA Funding Source: Custom
- Division Of Physics
- Direct For Mathematical & Physical Scien [1624739] Funding Source: National Science Foundation
The production of two prompt J/psi mesons, each with transverse momenta p(T) > 8.5 GeV and rapidity vertical bar y vertical bar < 2.1, is studied using a sample of proton-proton collisions at root s = 8 TeV, corresponding to an integrated luminosity of 11.4 fb(-1) collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised J/psi production, is measured as a function of the transverse momentum of the lower-p(T) J/psi meson, di-J/psi p(T) and mass, the difference in rapidity between the two J/psi mesons, and the azimuthal angle between the two J/psi mesons. The fraction of prompt pair events due to double parton scattering is determined by studying kinematic correlations between the two J/psi mesons. The total and double parton scattering cross-sections are compared with predictions. The effective cross-section of double parton scattering is measured to be sigma(eff) = 6.3 +/- 1.6(stat) +/- 1.0(syst) mb.
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