The first observation of the decay B0sbar -> D0K∗0 using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb(-1), is reported. A signal of 34.4 +/- 6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B0sbar -> D0K∗0 branching fraction is measured relative to that of B0sbar-> D0 rho0 : B(B0sbar -> D0K∗0) / B(B0sbar-> D0 rho0) = 1.48+/-0.34+/-0.15+/-0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B-0 and B-s(0) hadronisation fractions. (C) 2011 CERN. Published by Elsevier B.V. All right reserved.

Aaij, R., Abelian Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2011). First observation of the decay B0sbar -> D0K∗0 and a measurement of the ratio of branching fractions B(B0sbar -> D0K∗0) / B(B0sbar -> D0 rho0). PHYSICS LETTERS. SECTION B, 706(1), 32-39 [10.1016/j.physletb.2011.10.073].

First observation of the decay B0sbar -> D0K∗0 and a measurement of the ratio of branching fractions B(B0sbar -> D0K∗0) / B(B0sbar -> D0 rho0)

CALVI, MARTA;FANCHINI, ERICA;Pessina, G;
2011

Abstract

The first observation of the decay B0sbar -> D0K∗0 using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb(-1), is reported. A signal of 34.4 +/- 6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B0sbar -> D0K∗0 branching fraction is measured relative to that of B0sbar-> D0 rho0 : B(B0sbar -> D0K∗0) / B(B0sbar-> D0 rho0) = 1.48+/-0.34+/-0.15+/-0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B-0 and B-s(0) hadronisation fractions. (C) 2011 CERN. Published by Elsevier B.V. All right reserved.
Articolo in rivista - Articolo scientifico
flavor physics; B physics; branching fraction; CKM angle gamma; experimental results
English
2011
706
1
32
39
none
Aaij, R., Abelian Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2011). First observation of the decay B0sbar -> D0K∗0 and a measurement of the ratio of branching fractions B(B0sbar -> D0K∗0) / B(B0sbar -> D0 rho0). PHYSICS LETTERS. SECTION B, 706(1), 32-39 [10.1016/j.physletb.2011.10.073].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/37412
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