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Titolo:
Searching for new physics via CP violation in B ->pi pi - art. no. 054015
Autore:
London, D; Sinha, N; Sinha, R;
Indirizzi:
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada Univ Montreal Montreal PQ Canada H3C 3J7 ue, Montreal, PQ H3C 3J7, Canada Inst Math Sci, Taramani 600113, Chennai, India Inst Math Sci Taramani Chennai India 600113 ramani 600113, Chennai, India
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 5, volume: 6305, anno: 2001,
pagine: 4015 -
SICI:
0556-2821(20010301)6305:5<4015:SFNPVC>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
STATE INTERACTION PHASES; B-DECAYS; DISCRETE AMBIGUITIES; UNITARITY TRIANGLE; STANDARD MODEL; ANGLE-GAMMA; WEAK PHASE; ASYMMETRIES; EXTRACTION; AMPLITUDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: London, D Univ Montreal, Lab Rene JA Levesque, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada Univ Montreal CP 6128,Succ Ctr Ville Montreal PQ Canada H3C 3J7
Citazione:
D. London et al., "Searching for new physics via CP violation in B ->pi pi - art. no. 054015", PHYS REV D, 6305(5), 2001, pp. 4015

Abstract

It is well known that one can use B --> pi pi decays to probe the CP-violating phase alpha. In this paper we show that these same decays can be used to search for new physics. This is done by comparing two weak phases which are equal in the standard model: the phase of the t-quark contribution to the b-->d penguin amplitude, and the phase of B-d(o)-B-d((o) over bar) mixing. In order to make such a comparison, we require one piece of theoretical input, which we take to be a prediction fur \P/T\, the relative size of thepenguin and tree contributions to B-d(o) -->pi (+)pi (-). If independent knowledge of alpha is available, the decay B-d(o)(t) --> pi (+)pi (-) alone can be used to search For new physics. If a full isospin analysis can be done, then new physics can be found solely through measurements of B-->pi pi decays. The most promising scenario occurs when the isospin analysis can becombined with independent knowledge of alpha. In all cases, the prospects for detecting new physics in B --> pi pi decays can be greatly improved with the help of additional measurements which will remove discrete ambiguities.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 01:59:29