CRIS Current Research Information System

The differential branching fraction of the decay Λ0b → Λ μ+ μ− is measured as a function of the square of the dimuon invariant mass, q2. A yield of 78±12 Λ0b → Λ μ+ μ− 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 q2 region above the square of the J/ψ mass, while at lower-q2 values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q2, while excluding the J/ψ and ψ(2S) regions, gives a branching fraction of B(Λ0b → Λ μ+ μ−) = (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, Λ0b → J/ψ Λ, respectively.

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2013). Measurement of the Differential Branching Fraction of the Decay Λ0b → Λ μ+ μ−. 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 Λ0b → Λ μ+ μ−

CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

The differential branching fraction of the decay Λ0b → Λ μ+ μ− is measured as a function of the square of the dimuon invariant mass, q2. A yield of 78±12 Λ0b → Λ μ+ μ− 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 q2 region above the square of the J/ψ mass, while at lower-q2 values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q2, while excluding the J/ψ and ψ(2S) regions, gives a branching fraction of B(Λ0b → Λ μ+ μ−) = (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, Λ0b → J/ψ Λ, respectively.
2013
R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2013). Measurement of the Differential Branching Fraction of the Decay Λ0b → Λ μ+ μ−. PHYSICS LETTERS. SECTION B, 725(1-3), 25-35 [10.1016/j.physletb.2013.06.060].
R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/165252
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 49
  • ???jsp.display-item.citation.isi??? 51
social impact