Measurement of the CP observables in B̄s 0 → Ds + K- and first observation of B̄(s) 0 → Ds + K -π + π - and B̄(s) 0 → Ds1(2536)+ π -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

First measurements of the CP observables in the B̄(s) 0 → Ds + K- decay have been re-158 ported. With the larger data sample recorded in 2012, and the larger data set antici-pated in the future, this decay will contribute significantly to the determination of the weak phase γ. First observations of the B̄(s) 0 → Ds + K -π+π- and B̄0 → D+s K-π+π-are also reported. The former can be used in a similar way to B̄(s) 0 → Ds + K -- to extract γ. After including Ds + → π+π-π+ and Ds + → K-π+π- decays, and re-optimizing the selection for B̄(s) 0 → Ds +K-π+π- only, the yield in this mode more than doubles with a comparable signal-to-background. The yield in this mode is therefore expected to have about 35-40% of that obtained in B̄ (s) 0 → Ds + K-. The B̄(s) 0 → Ds1(2536) +π- decay is also observed for the first time, and its branching frac-tion relative to B̄(s) 0 → D s + π-π+π- is presented.

Original languageEnglish (US)
Title of host publication7th International Workshop on the CKM Unitarity Triangle, CKM 2012
StatePublished - 2012
Event7th International Workshop on the CKM Unitarity Triangle, CKM 2012 - Cincinnati, OH, United States
Duration: Sep 28 2012Oct 2 2012

Other

Other7th International Workshop on the CKM Unitarity Triangle, CKM 2012
CountryUnited States
CityCincinnati, OH
Period9/28/1210/2/12

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Decay
Large Data
Large Data Sets
Branching
Observation
Background

ASJC Scopus subject areas

  • Mathematics (miscellaneous)

Cite this

Measurement of the CP observables in B̄s 0 → Ds + K- and first observation of B̄(s) 0 → Ds + K -π + π - and B̄(s) 0 → Ds1(2536)+ π - . / Blusk, Steven Roy.

7th International Workshop on the CKM Unitarity Triangle, CKM 2012. 2012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Blusk, SR 2012, Measurement of the CP observables in B̄s 0 → Ds + K- and first observation of B̄(s) 0 → Ds + K -π + π - and B̄(s) 0 → Ds1(2536)+ π - . in 7th International Workshop on the CKM Unitarity Triangle, CKM 2012. 7th International Workshop on the CKM Unitarity Triangle, CKM 2012, Cincinnati, OH, United States, 9/28/12.
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abstract = "First measurements of the CP observables in the B̄(s) 0 → Ds + K- decay have been re-158 ported. With the larger data sample recorded in 2012, and the larger data set antici-pated in the future, this decay will contribute significantly to the determination of the weak phase γ. First observations of the B̄(s) 0 → Ds + K -π+π- and B̄0 → D+s K-π+π-are also reported. The former can be used in a similar way to B̄(s) 0 → Ds + K -- to extract γ. After including Ds + → π+π-π+ and Ds + → K-π+π- decays, and re-optimizing the selection for B̄(s) 0 → Ds +K-π+π- only, the yield in this mode more than doubles with a comparable signal-to-background. The yield in this mode is therefore expected to have about 35-40{\%} of that obtained in B̄ (s) 0 → Ds + K-. The B̄(s) 0 → Ds1(2536) +π- decay is also observed for the first time, and its branching frac-tion relative to B̄(s) 0 → D s + π-π+π- is presented.",
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N2 - First measurements of the CP observables in the B̄(s) 0 → Ds + K- decay have been re-158 ported. With the larger data sample recorded in 2012, and the larger data set antici-pated in the future, this decay will contribute significantly to the determination of the weak phase γ. First observations of the B̄(s) 0 → Ds + K -π+π- and B̄0 → D+s K-π+π-are also reported. The former can be used in a similar way to B̄(s) 0 → Ds + K -- to extract γ. After including Ds + → π+π-π+ and Ds + → K-π+π- decays, and re-optimizing the selection for B̄(s) 0 → Ds +K-π+π- only, the yield in this mode more than doubles with a comparable signal-to-background. The yield in this mode is therefore expected to have about 35-40% of that obtained in B̄ (s) 0 → Ds + K-. The B̄(s) 0 → Ds1(2536) +π- decay is also observed for the first time, and its branching frac-tion relative to B̄(s) 0 → D s + π-π+π- is presented.

AB - First measurements of the CP observables in the B̄(s) 0 → Ds + K- decay have been re-158 ported. With the larger data sample recorded in 2012, and the larger data set antici-pated in the future, this decay will contribute significantly to the determination of the weak phase γ. First observations of the B̄(s) 0 → Ds + K -π+π- and B̄0 → D+s K-π+π-are also reported. The former can be used in a similar way to B̄(s) 0 → Ds + K -- to extract γ. After including Ds + → π+π-π+ and Ds + → K-π+π- decays, and re-optimizing the selection for B̄(s) 0 → Ds +K-π+π- only, the yield in this mode more than doubles with a comparable signal-to-background. The yield in this mode is therefore expected to have about 35-40% of that obtained in B̄ (s) 0 → Ds + K-. The B̄(s) 0 → Ds1(2536) +π- decay is also observed for the first time, and its branching frac-tion relative to B̄(s) 0 → D s + π-π+π- is presented.

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