Measurement of the χ b (3P) mass and of the relative rate of χ b1(1P) and χ b2(1P) production
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Abstract
The production of b mesons in proton-proton collisions is studied using a data
sample collected by the LHCb detector, at centre-of-mass energies of
p
s = 7 and 8TeV
and corresponding to an integrated luminosity of 3.0 fb−1. The b mesons are identified
through their decays to (1S)
and (2S)
using photons that converted to e+e− pairs
in the detector. The relative prompt production rate of b1(1P) and b2(1P) mesons
is measured as a function of the (1S) transverse momentum in the b rapidity range
2.0 < y < 4.5. A precise measurement of the b(3P) mass is also performed. Assuming a
mass splitting between the b1(3P) and the b2(3P) states of 10.5 MeV/c2, the measured
mass of the b1(3P) meson is
m( b1(3P)) = 10515.7+2.2
−3.9(stat)+1.5
−2.1(syst)MeV/c2.
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Bibliographic citation
Aaij, R., Adeva, B., Adinolfi, M. et al. Measurement of the χ b (3P) mass and of the relative rate of χ b1(1P) and χ b2(1P) production. J. High Energ. Phys. 2014, 88 (2014). https://doi.org/10.1007/JHEP10(2014)088
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https://doi.org/10.1007/JHEP10(2014)088Sponsors
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© CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.