Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D(+)X mu(-)(nu) over bar and (B) over bar (0)(s) -> D(0)K(+)X mu(-)(nu) over bar are detected. Two structures are observed in the D(0)K(+) mass spectrum at masses consistent with the known D(s1)(2536)(+) and D(s2)*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> D(s2)(*)X mu(-)(nu) over bar /B(B(2)(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> D(s2)(*)X mu(-)(nu) over bar /B(B(2)(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D(s2)*(+) state in B(s2)*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

First observation of (B)over-bar(s)(0) -> D(s2)*(+)X mu(-)(nu)over-bar decays RID C-3725-2011 / R., A., B., A., M., A., C., A., A., A., M., A., Z., A., J., A., F., A., M., A., P. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. A., N., R. B., A., O. A., G., A., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 698:(2011), pp. 14-20. [10.1016/j.physletb.2011.02.039]

First observation of (B)over-bar(s)(0) -> D(s2)*(+)X mu(-)(nu)over-bar decays RID C-3725-2011

G. Casse;PENSO, Gianni;SARTI, ALESSIO;SCIUBBA, Adalberto;
2011

Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D(+)X mu(-)(nu) over bar and (B) over bar (0)(s) -> D(0)K(+)X mu(-)(nu) over bar are detected. Two structures are observed in the D(0)K(+) mass spectrum at masses consistent with the known D(s1)(2536)(+) and D(s2)*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> D(s2)(*)X mu(-)(nu) over bar /B(B(2)(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> D(s2)(*)X mu(-)(nu) over bar /B(B(2)(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D(s2)*(+) state in B(s2)*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
First observation of (B)over-bar(s)(0) -> D(s2)*(+)X mu(-)(nu)over-bar decays RID C-3725-2011 / R., A., B., A., M., A., C., A., A., A., M., A., Z., A., J., A., F., A., M., A., P. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. A., N., R. B., A., O. A., G., A., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 698:(2011), pp. 14-20. [10.1016/j.physletb.2011.02.039]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/407650
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