In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, |Vub| and |Vcb|, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λ0 b baryon to decay into the pµ−νµ final state relative to the Λ+c µ− νµ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of |Vcb|, the first |Vub| measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of |Vub| using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.

Determination of the quark coupling strength /V<inf>ub</inf>/ using baryonic decays / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P.A., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: NATURE PHYSICS. - ISSN 1745-2473. - 11:9(2015), pp. 743-747. [10.1038/nphys3415]

Determination of the quark coupling strength /Vub/ using baryonic decays

Capriotti, L.;Casse, G.;SARTI, ALESSIO;SCIUBBA, Adalberto;
2015

Abstract

In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, |Vub| and |Vcb|, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λ0 b baryon to decay into the pµ−νµ final state relative to the Λ+c µ− νµ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of |Vcb|, the first |Vub| measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of |Vub| using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.
2015
Charm physics Heavy Ion Experiments Heavy-ion collision Particle and resonance production
01 Pubblicazione su rivista::01a Articolo in rivista
Determination of the quark coupling strength /V<inf>ub</inf>/ using baryonic decays / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P.A., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: NATURE PHYSICS. - ISSN 1745-2473. - 11:9(2015), pp. 743-747. [10.1038/nphys3415]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/836070
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