The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two bbar quarks, X(b bbar b bbar). The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies √s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb−1. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the X(b bbar b bbar) state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range [2.0, 5.0], and the X(b bbar b bbar) state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Search for beautiful tetraquarks in the ϒ(1S)μ + μ − invariant-mass spectrum. JOURNAL OF HIGH ENERGY PHYSICS, 2018(10) [10.1007/JHEP10(2018)086].

Search for beautiful tetraquarks in the ϒ(1S)μ + μ − invariant-mass spectrum

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

Abstract

The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two bbar quarks, X(b bbar b bbar). The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies √s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb−1. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the X(b bbar b bbar) state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range [2.0, 5.0], and the X(b bbar b bbar) state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c
Articolo in rivista - Articolo scientifico
B physics; Exotics; Hadron-Hadron scattering (experiments); Heavy quark production; Nuclear and High Energy Physics
English
2018
2018
10
86
open
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Search for beautiful tetraquarks in the ϒ(1S)μ + μ − invariant-mass spectrum. JOURNAL OF HIGH ENERGY PHYSICS, 2018(10) [10.1007/JHEP10(2018)086].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/215353
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