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Decay rates of $B^0(t)\to\pi^+\pi^-,~B^0\to\pi^- K^+,~B^+\to\pi^+ K^0~ (K_S\to\pi^+\pi^-$) and of charge-conjugate processes are studied within flavor SU(3) symmetry and first-order SU(3) breaking. We show that these measurements can…

High Energy Physics - Phenomenology · Physics 2011-07-19 Michael Gronau , Jonathan L. Rosner

Various strategies for extracting or constraining the weak phase gamma with controlled theoretical uncertainties are reviewed. Measurements of the rates for the hadronic decays B^+- -> pi K provide largely model-independent information on…

High Energy Physics - Phenomenology · Physics 2007-05-23 Matthias Neubert

We present several alternative techniques used by the BaBar Collaboration in order to measure the Unitarity Triangle angle gamma. We also present the results of two searches designed to improve the measurements of sin(2beta) using penguin B…

High Energy Physics - Experiment · Physics 2007-05-23 Gabriele Benelli

There is no good reason to think that BSM-CP-odd phases(s) will necessarily cause large deviations in B-physics from predictions of the SM. Therefore, residual theory error in extraction of the unitarity triangle can undermine experimental…

High Energy Physics - Phenomenology · Physics 2007-05-23 David Atwood , Amarjit Soni

Assuming SU(3) symmetry for the strong phases in the four decay modes $B\rarrow \pi^-\pi^+, \pi^0 \pi^+, \pi^- K^+, \pi^- \bar{K}^0$ and ignoring the relative small electroweak penguin effects in those decays, the weak phase $\gamma$ and…

High Energy Physics - Phenomenology · Physics 2014-11-17 Yue-Liang Wu , Yu-Feng Zhou

Measurements of the angles and sides of the unitarity triangle and of the rates of rare B meson decays are crucial for the precise determination of Standard Model parameters and are sensitive to the presence of new physics particles in the…

High Energy Physics - Experiment · Physics 2010-11-05 Francesco Forti

We suggest two methods (based on flavor SU(3) symmetry) to determine the CKM angle $\gamma$ using the decays $B_d$, $B^+ \to K \eta (\eta')$ and $B_s \to \pi \eta (\eta')$, respectively. Rescattering effects are partly included -- we…

High Energy Physics - Phenomenology · Physics 2010-11-23 K. Agashe , N. G. Deshpande

We propose a new way for determining the CP violation angle $\gamma$ without any hadronic uncertainty. The suggested method is to use the two triangles formed by the decay amplitudes of $B^\pm\to (D^0,\bar D^0,D_{CP}^0)…

High Energy Physics - Phenomenology · Physics 2012-04-03 Wei Wang

The decays $B^\pm\to \pi^\pm K$ and $B_d\to \pi^\mp K^\pm$ were observed by the CLEO collaboration last year; they may play an important role to probe the angle $\gamma$ of the unitarity triangle of the CKM matrix. After a general…

High Energy Physics - Phenomenology · Physics 2010-11-23 Robert Fleischer

Methods for extracting the Unitarity Triangle angle $\phi_3$ from B decays to final states incluing a $D$ meson are reviewed. The current experimental status and future prospects are summarized.

High Energy Physics - Experiment · Physics 2010-11-23 T. J. Gershon

If the weak phase of B_s-anti B_s mixing (2 beta_s) is found to be significantly different from zero, this is a clear signal of new physics (NP). However, if such a signal is found, we would like an unambiguous determination of 2 beta_s in…

High Energy Physics - Phenomenology · Physics 2013-05-30 Soumitra Nandi , David London

Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the measurements of |V_ub/V_cb|, Delta M_d,…

High Energy Physics - Phenomenology · Physics 2014-11-18 UTfit Collaboration , M. Bona , M. Ciuchini , E. Franco , V. Lubicz , G. Martinelli , F. Parodi , M. Pierini , P. Roudeau , C. Schiavi , L. Silvestrini , A. Stocchi

Several time-independent methods have been devised for measuring the phase gamma of the Cabibbo-Kobayashi-Maskawa unitarity triangle. It is shown that such measurements generally suffer from discrete ambiguity which is at least 8-fold, not…

High Energy Physics - Phenomenology · Physics 2010-11-23 Abner Soffer

U-spin multiplet approach is applied to the full set of charmless hadronic B+/- --> M0 M+/- decays for the purpose of precise extraction of the unitarity angle gamma. Each of the four data sets, P0 P+/-, P0 V+/-, V0 P+/- and V0 V+/-, with P…

High Energy Physics - Phenomenology · Physics 2010-11-05 Amarjit Soni , Denis A. Suprun

The $B_s \to D_s^{(*)\pm} K^\mp$ decays allow a theoretically clean determination of $\phi_s+\gamma$, where $\phi_s$ is the $B^0_s$-$\bar B^0_s$ mixing phase and $\gamma$ the usual angle of the unitarity triangle. A sizable $B_s$ decay…

High Energy Physics - Phenomenology · Physics 2012-12-14 Kristof De Bruyn , Robert Fleischer , Robert Knegjens , Marcel Merk , Manuel Schiller , Niels Tuning

B-meson decays involving b->u transitions are sensitive to the Unitarity Triangle angle alpha (or phi_2). The B-factories at SLAC and KEK have made significant progress toward the measurement of alpha in recent years. This paper summarizes…

High Energy Physics - Experiment · Physics 2009-11-11 A. Bevan

We suggest a new technique to determine the CKM phase $\gamma$ {\em without} neglecting the (soft) final state rescattering effects. We use (time integrated) $B$ meson decay rates to $\pi$'s and $K$'s. A set of 5 $\Delta S = 0$ (or 1…

High Energy Physics - Phenomenology · Physics 2009-10-31 K. Agashe , N. G. Deshpande

Recently, it was proposed to use measurements of Bd(t) -> D(*)+ D(*)- and Bd -> Ds(*)+ D(*)- decays to measure the CP phase gamma. In this paper, we present the extraction of gamma using this method. We find that gamma is favored to lie in…

High Energy Physics - Phenomenology · Physics 2010-11-23 Justin Albert , Alakabha Datta , David London

Several years ago, it was pointed out that the U-spin-related decays $B_d\to\pi^+\pi^-$, $B_s\to K^+K^-$ and $B_d\to\pi^\mp K^\pm$, $B_s\to \pi^\pm K^\mp$ offer interesting strategies for the extraction of the angle gamma of the unitarity…

High Energy Physics - Phenomenology · Physics 2008-11-26 Robert Fleischer

The measurements of the angle alpha (phi2) of the unitarity triangle at the B factories are reviewed. The value of alpha determined by combining the results obtained in the B to pi pi, B to rho pi, and B to rho rho modes by both the BABAR…

High Energy Physics - Experiment · Physics 2008-10-03 G. Vasseur