The ϒ(1S) μ+ μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two anti-b quarks, X_{b anti-b b anti-b}. 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 anti-b b anti-b} 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 anti-b b anti-b} 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), 0-21 [10.1007/JHEP10(2018)086].

Search for Beautiful Tetraquarks in the ϒ(1S) μ+ μ− Invariant-Mass Spectrum

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.;
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 anti-b quarks, X_{b anti-b b anti-b}. 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 anti-b b anti-b} 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 anti-b b anti-b} state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c.
2018
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), 0-21 [10.1007/JHEP10(2018)086].
Aaij, R.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/649686
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