The radiative decay Λ0b → Λ γ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb^−1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0 → K*0 γ decay as a normalization mode and is found to be B(Λ0b → Λ γ) = (7.1 ± 1.5 ± 0.6 ± 0.7) × 10^−6 , where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon.

Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). First Observation of the Radiative Decay Λ0b → Λ γ. PHYSICAL REVIEW LETTERS, 123(3), 1-11 [10.1103/PhysRevLett.123.031801].

First Observation of the Radiative Decay Λ0b → Λ γ

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2019

Abstract

The radiative decay Λ0b → Λ γ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb^−1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0 → K*0 γ decay as a normalization mode and is found to be B(Λ0b → Λ γ) = (7.1 ± 1.5 ± 0.6 ± 0.7) × 10^−6 , where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon.
2019
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., et al. (2019). First Observation of the Radiative Decay Λ0b → Λ γ. PHYSICAL REVIEW LETTERS, 123(3), 1-11 [10.1103/PhysRevLett.123.031801].
Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Aidala, C.A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/701079
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