The differential branching fraction of the decay Lambda(0)(b) -> Lambda mu(+) mu(-) is measured as a function of the square of the dimuon invariant mass, q(2). A yield of 78 +/- 12 Lambda(0)(b) -> Lambda mu(+) mu(-) decays is observed using data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q(2) region above the square of the J/psi mass, while at lower-q(2) values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q(2), while excluding the J/psi and psi(2S) regions, gives a branching fraction of B(Lambda(0)(b) -> Lambda mu(+) mu(-)) = (0.96 +/- 0.16(stat) +/- 0.13(syst) +/- 0.21 (norm)) x 10(-6), where the uncertainties are statistical, systematic and due to the normalisation mode, Lambda(0)(b) -> J/psi Lambda, respectively. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

Archilli, F., Carboni, G., Santovetti, E., The LHCb, C. (2013). Measurement of the differential branching fraction of the decay Lambda(0)(b) -> Lambda mu(+) mu(-). PHYSICS LETTERS. SECTION B, 725(1-3), 25-35 [10.1016/j.physletb.2013.06.060].

Measurement of the differential branching fraction of the decay Lambda(0)(b) -> Lambda mu(+) mu(-)

Archilli, F
Membro del Collaboration Group
;
Carboni, G
Membro del Collaboration Group
;
Santovetti, E
Membro del Collaboration Group
;
2013-01-01

Abstract

The differential branching fraction of the decay Lambda(0)(b) -> Lambda mu(+) mu(-) is measured as a function of the square of the dimuon invariant mass, q(2). A yield of 78 +/- 12 Lambda(0)(b) -> Lambda mu(+) mu(-) decays is observed using data, corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q(2) region above the square of the J/psi mass, while at lower-q(2) values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q(2), while excluding the J/psi and psi(2S) regions, gives a branching fraction of B(Lambda(0)(b) -> Lambda mu(+) mu(-)) = (0.96 +/- 0.16(stat) +/- 0.13(syst) +/- 0.21 (norm)) x 10(-6), where the uncertainties are statistical, systematic and due to the normalisation mode, Lambda(0)(b) -> J/psi Lambda, respectively. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
2013
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Archilli, F., Carboni, G., Santovetti, E., The LHCb, C. (2013). Measurement of the differential branching fraction of the decay Lambda(0)(b) -> Lambda mu(+) mu(-). PHYSICS LETTERS. SECTION B, 725(1-3), 25-35 [10.1016/j.physletb.2013.06.060].
Archilli, F; Carboni, G; Santovetti, E; The LHCb, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/136018
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