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  • Using 1.8 fb(-1) of pp collisions at a center- of- mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of Upsilon(1S,2S,3S) mesons. Upsilon mesons are reconstructed using the dimuon decay mode. Total production cross sections for p(T) < 70 GeV and in the rapidity interval vertical bar y(Upsilon)vertical bar < 2. 25 are measured to be, 8.01 +/- 0.02 +/- 0.36 +/- 0.31 nb, 2.05 +/- 0.01 +/- 0.12 +/- 0.08 nb, and 0.92 +/- 0.01 +/- 0.07 +/- 0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times dimuon branching fractions for Upsilon(1S), Upsilon(2S), and Upsilon(3S) as a function of Upsilon transverse momentum pT and rapidity are presented. These cross sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame, the cross section may vary by approximately +/- 20%. If a nontrivial azimuthal dependence is considered, integrated cross sections may be significantly enhanced by a factor of 2 or more. We compare our results to several theoretical models of Upsilon meson production, finding that none provide an accurate description of our data over the full range of Upsilon transverse momenta accessible with this data set. DOI. 10.1103/ PhysRevD. 87.052004
  • Using 1.8 fb(-1) of pp collisions at a center- of- mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of Upsilon(1S,2S,3S) mesons. Upsilon mesons are reconstructed using the dimuon decay mode. Total production cross sections for p(T) < 70 GeV and in the rapidity interval vertical bar y(Upsilon)vertical bar < 2. 25 are measured to be, 8.01 +/- 0.02 +/- 0.36 +/- 0.31 nb, 2.05 +/- 0.01 +/- 0.12 +/- 0.08 nb, and 0.92 +/- 0.01 +/- 0.07 +/- 0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times dimuon branching fractions for Upsilon(1S), Upsilon(2S), and Upsilon(3S) as a function of Upsilon transverse momentum pT and rapidity are presented. These cross sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame, the cross section may vary by approximately +/- 20%. If a nontrivial azimuthal dependence is considered, integrated cross sections may be significantly enhanced by a factor of 2 or more. We compare our results to several theoretical models of Upsilon meson production, finding that none provide an accurate description of our data over the full range of Upsilon transverse momenta accessible with this data set. DOI. 10.1103/ PhysRevD. 87.052004 (en)
Title
  • Measurement of upsilon production in 7 TeV pp collisions at ATLAS
  • Measurement of upsilon production in 7 TeV pp collisions at ATLAS (en)
skos:prefLabel
  • Measurement of upsilon production in 7 TeV pp collisions at ATLAS
  • Measurement of upsilon production in 7 TeV pp collisions at ATLAS (en)
skos:notation
  • RIV/68407700:21670/13:00210492!RIV14-MSM-21670___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(ED2.1.00/03.0058), P(LA08032), P(LG13009), P(LG13031), Z(MSM0021620859), Z(MSM6840770039)
http://linked.open...iv/cisloPeriodika
  • 5
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 86849
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21670/13:00210492
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • ATLAS; cross section; upsilon (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [5A18CA64B80C]
http://linked.open...i/riv/nazevZdroje
  • Physical Review D
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 87
http://linked.open...iv/tvurceVysledku
  • Abbott, B.
  • Abdallah, J.
  • Aad, G.
  • Jakůbek, Jan
  • Král, Vlastimil
  • Kohout, Zdeněk
  • Pospíšil, Stanislav
  • Sopko, Bruno
  • Slavíček, Tomáš
  • Tureček, Daniel
  • Vacek, Václav
  • Štekl, Ivan
  • Krejčí, František
  • Smolek, Karel
  • Sopko, Vít
  • Šolc, Jaroslav
  • Augsten, Kamil
  • Holý, Tomáš
  • Sodomka, Jaromír
  • Solar, Michael
  • Vlasák, Michal
  • Vokáč, Petr
  • Šimák, Vladislav
  • Hubáček, Zdeněk
  • Abajyan, T.
  • Khalek, S. Abdel
http://linked.open...ain/vavai/riv/wos
  • 000315737000003
http://linked.open...n/vavai/riv/zamer
issn
  • 1550-7998
number of pages
http://bibframe.org/vocab/doi
  • 10.1103/PhysRevD.87.052004
http://localhost/t...ganizacniJednotka
  • 21670
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