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Sensitivity studies to the CP-violating parameters of the decay Bs->phi phi with the LHCb experiment are presented. The decay proceeds via a b->s s anti-s gluonic-penguin quark transition, which is sensitive to contributions from beyond the…

High Energy Physics - Phenomenology · Physics 2007-05-23 J. F. Libby

We report improved measurements of time-dependent CP violation parameters for B^0(\bar{B}^0) -> psi(2S) K_S. This analysis is based on a data sample of 657x10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the…

High Energy Physics - Experiment · Physics 2019-08-13 H. Sahoo , T. E. Browder , K. Trabelsi

Since the CP violation in the $B$ system has been investigated up to now only through processes related to the $B$--$\bar{B}$ mixing, urgently required is new way of study for the CP violation and establishing its origin in the $B$ system…

High Energy Physics - Phenomenology · Physics 2009-11-10 C. S. Kim , Yeong Gyun Kim , Kang Young Lee

We present the most complete analysis of the penguin correction to the extraction of the standard-model parameter sin(2\phi_1) from the B^0 -> J/psi K_S decay up to leading power in 1/m_b and to next-to-leading order in \alpha_s, \phi_1…

High Energy Physics - Phenomenology · Physics 2010-10-27 Hsiang-nan Li , Satoshi Mishima

We present an improved measurement of the standard model CP violation parameter sin2phi_1 (also known as sin2beta) based on a sample of 85 times 10^6 B Bbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB…

High Energy Physics - Experiment · Physics 2007-05-23 The Belle Collaboration , K. Abe

Decay rates and time-dependent and direct CP asymmetries in the decays $B^0\to K^+K^-K_{S(L)}$ and $K_S K_S K_{S(L)}$ are studied. Resonant and nonresonant contributions to the three-body decays are carefully investigated. Nonresonant…

High Energy Physics - Phenomenology · Physics 2014-11-18 Hai-Yang Cheng , Chun-Khiang Chua , Amarjit Soni

We consider sparticle contributions to time dependent CP asymmetry in B -> phi K_S. As for the gluino-squark loop, LR or RL insertion is more likely to give recently observed S_{phi K} < 0 than LL or RR insertion. Neutral Higgs contribution…

High Energy Physics - Phenomenology · Physics 2011-03-23 Jae-hyeon Park

We study the uncertainties of the Standard Model (SM) predictions for CP violating B decays and investigate where and how supersymmetric (SUSY) contributions may be disentangled. The first task is accomplished by letting the relevant matrix…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Ciuchini , E. Franco , G. Martinelli , A. Masiero , L. Silvestrini

We present the new and updated $BABAR$ measurements of CP-violation studies for many $b\to s $ penguin decay modes. We report the first observation of mixing-induced CP-violation in $B^0 \to \eta ^{'} K^0$ with a significance (including…

High Energy Physics - Experiment · Physics 2007-10-17 BaBar Collaboration , Nitesh Soni

In the presence of large New Physics contributions to loop-induced b->s transitions, sizable direct CP violation in B-> phi K decays is expected on general grounds. We compute explicitly CP-violating effects using QCD factorization and find…

High Energy Physics - Phenomenology · Physics 2009-11-07 M. Ciuchini , L. Silvestrini

Rare decays of B and K mesons and CP violations thereof are considered in SUSY models with S_3^3 flavor symmetry. SUSY contributions to epsilon_K and epsilon'/epsilon_K can be large, but not to B0 - B0 bar mixing because of strong…

High Energy Physics - Phenomenology · Physics 2009-11-07 P. Ko , Jae-hyeon Park

We study the sensitivity of the squark flavor mixing to the CP violating phenomena of $K$, $B^0$ and $B_s$ mesons in the framework of the split-family scenario, where the first and second family squarks are very heavy, ${\cal O}(10)$TeV, on…

High Energy Physics - Phenomenology · Physics 2015-06-16 Yusuke Shimizu , Morimitsu Tanimoto , Kei Yamamoto

The $B\to\pi\pi,\pi K$ system offers a powerful laboratory to probe strong and weak interactions. Using the isospin symmetry, we determine hadronic $B\to\pi\pi$ parameters from data where new measurements of direct CP violation in…

High Energy Physics - Phenomenology · Physics 2018-12-05 Robert Fleischer , Ruben Jaarsma , Eleftheria Malami , K. Keri Vos

We study time dependent CP asymmetries in B^0_{d,s} decays in the left-right model with spontaneous breakdown of CP. Due to the new contributions to B^0-\bar B^0 mixing the CP asymmetries can be substantially modified. Moreover, there can…

High Energy Physics - Phenomenology · Physics 2009-10-30 G. Barenboim , J. Bernabeu , M. Raidal

We consider several hints for new physics involving CP-asymmetries in B-decays and interpret them in terms of generic contributions to effective Wilson coefficients. The effects we focus on are: the differences in the fitted value of sin(2…

High Energy Physics - Phenomenology · Physics 2009-08-22 E. Lunghi , A. Soni

We discuss two models with 1 extra CP phase in $b\leftrightarrow s$ transition. The CP phase $\arg (V_{t^\prime s}V_{t^\prime b})$ with fourth generations, previously ignored, could impact on $b\to s\ell^+\ell^-$, $\Delta m_{B_s}$ and…

High Energy Physics - Phenomenology · Physics 2011-09-13 George W. S. Hou

Direct CP violation in B^0-> K^+\pi^- decay has emerged at -10% level, but the asymmetry in B^+ -> K^+\pi^0 mode is consistent with zero. This difference points towards possible New Physics in the electroweak penguin operator. We point out…

High Energy Physics - Phenomenology · Physics 2009-11-11 Wei-Shu Hou , Makiko Nagashima , Andrea Soddu

The study of CP violation in \Bs\, oscillations is a key measurement at the LHCb experiment. In this document, we discuss the latest LHCb results on the CP-violating phase, called $\phi_s$, using \BsJKK\, and \BsJpipi\, channels. To…

High Energy Physics - Experiment · Physics 2014-11-24 Walaa Kanso

We present measurements of the time-dependent CP-violation parameters S and C in B^0 --> eta' K^0 decays. The data sample corresponds to 384 million B Bar pairs produced by e^+ e^- annihilation at the Y(4S). The results are S = 0.58 +- 0.10…

High Energy Physics - Experiment · Physics 2010-03-19 The BABAR Collaboration , B. Aubert

We present the contributions of new CP phases in CP asymmetries of two-body neutral $B_s$ decays coming from a left--right model with spontaneous CP violation. Large deviations from the Standard Model predictions can be accommodated in a…

High Energy Physics - Phenomenology · Physics 2007-05-23 J. Matias