The B+→D∗−K+π+ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3  fb−1. A clear signal is observed, and the ratio of its branching fraction to that of the B+→D*−π+π+normalization channel is measured to be B(B+→D*−K+π+)/B(B+→D*−π+π+)=(6.39±0.27±0.48)×10−2, where the first uncertainty is statistical and the second is systematic. This is the first observation of the B+→D∗−K+π+ decay.

Observation of the B+ →d∗-K+π+ decay / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 96:1(2017). [10.1103/PhysRevD.96.011101]

Observation of the B+ →d∗-K+π+ decay

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

Abstract

The B+→D∗−K+π+ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3  fb−1. A clear signal is observed, and the ratio of its branching fraction to that of the B+→D*−π+π+normalization channel is measured to be B(B+→D*−K+π+)/B(B+→D*−π+π+)=(6.39±0.27±0.48)×10−2, where the first uncertainty is statistical and the second is systematic. This is the first observation of the B+→D∗−K+π+ decay.
2017
Branching fraction CP violation Flavor physics Rare decay Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the B+ →d∗-K+π+ decay / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 96:1(2017). [10.1103/PhysRevD.96.011101]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074715
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