Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production

Aaij, Roel; Adeva, Bernardo; Adinolfi, Marco; Affolder, Anthony; Ajaltouni, Ziad; Akar, Simon; Albrecht, Johannes; Alessio, Federico; Alexander, Michael; Ali, Suvayu

doi:10.1007/JHEP10(2014)088

Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production

LHCb

Collaboration

Sep 4, 2014

22 pages

Published in:

JHEP 10 (2014) 088

Published: Oct 14, 2014

e-Print:

1409.1408 [hep-ex]

DOI:

10.1007/JHEP10(2014)088

PDG:

{\mathit m}_{{{\mathit \chi}_{{{b2}}}{(1P)}}}-{\mathit m}_{{{\mathit \chi}_{{{b1}}}{(1P)}}}

Report number:

LHCB-PAPER-2014-040,
CERN-PH-EP-2014-206,
LHCB-PAPER-2014-040-CERN_PH_EP_2014_206

Experiments:

CERN-LHC-LHCb

View in:

datasets

reference search68 citations

Citations per year

Abstract: (Springer)

The production of χ

_{b}

mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of

\sqrt{s}

=7 and 8 TeV and corresponding to an integrated luminosity of 3.0 fb

^{−1}

. The χ

_{b}

mesons are identified through their decays to ϒ(1S)γ and ϒ(2S)γ using photons that converted to e

^{+}

e

^{−}

pairs in the detector. The relative prompt production rate of χ

_{b1}

(1P) and χ

_{b2}

(1P) mesons is measured as a function of the ϒ(1S) transverse momentum in the χ

_{b}

rapidity range 2.0 < y <4.5. A precise measurement of the χ

_{b}

(3P) mass is also performed. Assuming a mass splitting between the χ

_{b1}

(3P) and the χ

_{b2}

(3P) states of 10.5 MeV/c

^{2}

, the measured mass of the χ

_{b1}

(3P) meson is

Quarkonium
Hadron-Hadron Scattering
Flavor physics
p p: scattering
Upsilon(9460)
transverse momentum dependence
chi mesons: direct production
mass difference
Upsilon(10020)
rapidity dependence

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Figures(12)

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Measurement of the χb(3P)\chi_b(3P)χb​(3P) mass and of the relative rate of χb1(1P)\chi_{b1}(1P)χb1​(1P) and χb2(1P)\chi_{b2}(1P)χb2​(1P) production

Citations per year

Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production