The first evidence for the decay B-→D∗∗0τ-ν¯τ is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1, at centre-of-mass energies of 7, 8, and 13 TeV. Here, the D∗∗0 meson represents any of the three excited charm mesons D1(2420)0, D2∗(2460)0, and D1′(2400)0. The B-→D∗∗0τ-ν¯τ signal is measured with a significance of 3.5σ, including systematic uncertainties. The combined branching fraction B(B-→D1,2∗∗0τ-ν¯τ)×B(D1,2∗∗0→D∗+π-), where D1,2∗∗0 denotes both D1(2420)0 and D2∗(2460)0 contributions, is measured to be [0.051±0.013(stat)±0.006(syst)±0.009(ext)]%, where the last uncertainty reflects that of the branching fraction of the normalization channel B-→D1,2∗∗0Ds-(∗). The ratio between the tauonic and muonic semileptonic B decays, with the latter taken from world average values, is also determined and found to be R(D1,2∗∗0)=0.13±0.03(stat)±0.01(syst)±0.02(ext).

Evidence for B- →D∗∗0τ- ντ ¯ Decays / Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A.A., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Aliouche, Z., Alvarez Cartelle, P., Amalric, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 135:2(2025), pp. 0-0. [10.1103/rj9h-n4w1]

Evidence for B- →D∗∗0τ- ντ ¯ Decays

Bizzeti A.;
2025

Abstract

The first evidence for the decay B-→D∗∗0τ-ν¯τ is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1, at centre-of-mass energies of 7, 8, and 13 TeV. Here, the D∗∗0 meson represents any of the three excited charm mesons D1(2420)0, D2∗(2460)0, and D1′(2400)0. The B-→D∗∗0τ-ν¯τ signal is measured with a significance of 3.5σ, including systematic uncertainties. The combined branching fraction B(B-→D1,2∗∗0τ-ν¯τ)×B(D1,2∗∗0→D∗+π-), where D1,2∗∗0 denotes both D1(2420)0 and D2∗(2460)0 contributions, is measured to be [0.051±0.013(stat)±0.006(syst)±0.009(ext)]%, where the last uncertainty reflects that of the branching fraction of the normalization channel B-→D1,2∗∗0Ds-(∗). The ratio between the tauonic and muonic semileptonic B decays, with the latter taken from world average values, is also determined and found to be R(D1,2∗∗0)=0.13±0.03(stat)±0.01(syst)±0.02(ext).
2025
135
2
0
0
Evidence for B- →D∗∗0τ- ντ ¯ Decays / Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A.A., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Aliouche, Z., Alvarez Cartelle, P., Amalric, R., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 135:2(2025), pp. 0-0. [10.1103/rj9h-n4w1]
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoul...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1392449
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