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Titolo:
Size of penguin pollution of the CKM CP violating phase in (B)over-bar(s) -> rho K-S
Autore:
Ward, BFL;
Indirizzi:
Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA Univ Tennessee Knoxville TN USA 37996 s & Astron, Knoxville, TN 37996 USA Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA Stanford Univ Stanford CA USA 94309 celerator Ctr, Stanford, CA 94309 USA
Titolo Testata:
ACTA PHYSICA POLONICA B
fascicolo: 7-8, volume: 32, anno: 2001,
pagine: 2059 - 2080
SICI:
0587-4254(200107/08)32:7-8<2059:SOPPOT>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-BODY B-DECAYS; UNITARITY TRIANGLE; BRANCHING RATIOS; FACTORIZATION APPROACH; EXCLUSIVE PROCESSES; NONLEPTONIC DECAYS; STANDARD MODEL; FORM-FACTORS; ASYMMETRIES; MESONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Ward, BFL Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA UnivTennessee Knoxville TN USA 37996 , Knoxville, TN 37996 USA
Citazione:
B.F.L. Ward, "Size of penguin pollution of the CKM CP violating phase in (B)over-bar(s) -> rho K-S", ACT PHY P B, 32(7-8), 2001, pp. 2059-2080

Abstract

We use the perturbative QCD methods of Lepage and Brodsky to calculate therate for (B) over bar (s) --> rhoK(S), with an eye toward the CP violatingunitarity triangle angle gamma. We show that, although the penguins are large, there are regions of the allowed parameter space of the Cabibbo-Kobayashi-Maskawa (CKM) mixing matrix wherein gamma is measurable in the sense that penguins change of the value of sin(2 gamma) one would extract from the attendant time dependent asymmetry measurement by less than 29%, so that a 3 sigma measurement of sin(2 gamma) as being different from 0 is allowed bythe corresponding theoretical uncertainty. This would establish CP violation in B-s decays. The rates which we find tend to favour the type of luminosities now envisioned for hadron-based B-factories.

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Documento generato il 25/01/20 alle ore 00:24:44