Observation of Y(1S) pair production in proton-proton collisions at √s=8 TeV

The CMS collaboration

Araştırma sonucu: ???type-name???Makalebilirkişi

80 Atıf (Scopus)


Pair production of Y(1S) mesons is observed at the LHC in proton-proton collisions at s=8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb−1. Both Y(1S) candidates are fully reconstructed via their decays to μ+μ. The fiducial acceptance region is defined by an absolute Y(1S) rapidity smaller than 2.0. The fiducial cross section for the production of Y(1S) pairs, assuming that both mesons decay isotropically, is measured to be 68.8±12.7 (stat)±7.4 (syst)±2.8 (ℬ) pb, where the third uncertainty comes from the uncertainty in the branching fraction of Y(1S) decays to μ+μ. Assuming instead that the Y(1S) mesons are produced with different polarizations leads to variations in the measured cross section in the range from −38% to +36%.

Orijinal dilİngilizce
Makale numarası13
DergiJournal of High Energy Physics
Basın numarası5
Yayın durumuYayınlandı - 1 May 2017

Bibliyografik not

Publisher Copyright:
© 2017, The Author(s).


FinansörlerFinansör numarası
National Science Foundation1606321, 1151640, 1506130, 1211067, 1624356, 1508869
Science and Technology Facilities CouncilPP/E000479/1, GRIDPP, ST/H000925/1

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