Measuring α in B ( t ) → ρ ± π Gronau, M.; Zupan, J.
Physical review. D, Particles, fields, gravitation, and cosmology,
10/2004, Letnik:
70, Številka:
7
Journal Article
A sum rule relation is proposed for direct CP asymmetries in B→Kπ decays. Leading terms are identical in the isospin symmetry limit, while subleading terms are equal in the flavor SU(3) and heavy ...quark limits. The sum rule predicts ACP(B0→K0π0)=−0.17±0.06 using current asymmetry measurements for the other three B→Kπ decays. A violation of the sum rule would be evidence for new physics in b→sq¯q transitions.
There is some theoretical uncertainty in the predictions for {ital CP}-violating hadronic asymmetries in neutral-{ital B} decays to {ital CP} eigenstates due to the existence of penguin diagrams. ...Using isospin relations, we show that it is possible to remove this uncertainty for the decays {ital B}{sub {ital d}}{sup 0}{r arrow}{pi}{pi}.
{ital CP} asymmetries in neutral-{ital B} decays to {ital CP} eigenstates are studied in the standard model. Whereas usually one assumes a single decay amplitude which induces {ital CP} violation via ...{ital B}-{ital {bar B}} mixing, we investigate additional effects due to two interfering decay amplitudes. We estimate these effects in characteristic cases and suggest ways to experimentally distinguish between these two sources of asymmetries. The effects, which show up as time-integrated asymmetries at symmetric {ital e}{sup +}e{sup {minus}} colliders operating at the {Upsilon}(4{ital S}), are quite small in Kobayashi-Maskawa- (KM) allowed decays such as as {ital B}{sub {ital d}}{sup 0}{r arrow}K{sub S}{psi} and become large in KM-suppressed decays.
Rates and asymmetries in B→Kπ decays Gronau, Michael; Rosner, Jonathan L
Physics letters. B,
10/2003, Letnik:
572, Številka:
1-2
Journal Article
Recenzirano
Odprti dostop
We discuss a potential discrepancy in an approximate relation among B→Kπ rates which, with increased statistical significance, would imply new physics in ΔI=1 transitions. An approximate relation ...between CP-violating rate differences in B0/B0→K±π∓ and B±→K±π0 is used to combine these rate differences to reduce upper limits on the two CP asymmetries. These rates and asymmetries are used to update bounds on the CKM phase γ.
B decays to charmless VP final states Dighe, Amol S.; Gronau, Michael; Rosner, Jonathan L.
Physical review. D, Particles and fields,
02/1998, Letnik:
57, Številka:
3
Journal Article
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