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An analysis from the D0 Collaboration measuring the charge asymmetry A^b_sl of like-sign dimuon events due to semileptonic b-hadron decays at the Fermilab Tevatron Collider is described. It differs by 3.2 standard deviations from the…

High Energy Physics - Phenomenology · Physics 2019-08-21 R. Van Kooten

We study CP violation in a multi-Higgs doublet model based on a $S_3 \times Z_3$ horizontal symmetry. We consider two mechanisms for CP violation in this model: a) CP violation due to complex Yukawa couplings; and b) CP violation due to…

High Energy Physics - Phenomenology · Physics 2010-11-01 N. G. Deshpande , Xiao-Gang He

We study effects of CP violation in an associated production of a charged Higgs boson and a top quark at the LHC: $pp \to tH^\pm +X$. We calculate the CP violating asymmetry between the total cross section for $H^+$ and $H^-$ production at…

High Energy Physics - Phenomenology · Physics 2008-12-19 Ekaterina Christova , Helmut Eberl , Elena Ginina

We study CP violation in a multi-Higgs doublet model based on a $S_3 \times Z_3$ horizontal symmetry where CKM phase is not the principal source of CP violation. We consider two mechanisms for CP violation in this model: a) CP violation due…

High Energy Physics - Phenomenology · Physics 2010-11-01 N. G. Deshpande , Xiao-Gang He

Triple product asymmetries have been used to probe CP violation in $K$, $D$, and B decays. Here we review the interpretation of those asymmetries, and note that it is possible to construct twelve measurable triple product asymmetries for…

High Energy Physics - Phenomenology · Physics 2015-05-19 A. J. Bevan

The LHCb Collaboration has recently found a large CP-violating rate asymmetry in the $b$-baryon decay $\Lambda^0_b \to pK^-\pi^+\pi^-$. This is the first observation of CP violation in baryon processes, opening a new window to test its…

High Energy Physics - Phenomenology · Physics 2025-04-09 Xiao-Gang He , Chia-Wei Liu , Jusak Tandean

In supersymmetric theories the charged sleptons of different generations may oscillate amongst themselves while they decay. In the case of three generation oscillations, superpartner production at the LHC and NLC may lead to an observable…

High Energy Physics - Phenomenology · Physics 2014-11-17 Nima Arkani-Hamed , Hsin-Chia Cheng , Jonathan L. Feng , Lawrence J. Hall

We study the CP-violating terms of the spin-spin correlations in neutralino production and their subsequent two-body decays into sleptons plus leptons at the ILC. We analyze CP-sensitive observables with the help of T-odd products of the…

High Energy Physics - Phenomenology · Physics 2009-07-24 A. Bartl , K. Hohenwarter-Sodek , T. Kernreiter , O. Kittel , M. Terwort

We present results on CP violation from approximately 2.8 fb^{-1} of data collected by the D0 Experiment at the Fermilab Tevatron. The results presented are: (i) an improved measurement of the B_s^0 CP-violating phase from a flavor-tagged…

High Energy Physics - Experiment · Physics 2008-10-07 J. Ellison

Models with an extended scalar sector may in principle provide new sources of CP violation originating in the scalar potential. One of the simplest ways to implement this idea is to have CP violation in a two-Higgs-doublet model. Here, it…

High Energy Physics - Phenomenology · Physics 2016-04-05 D. Emmanuel-Costa , O. M. Ogreid , P. Osland , M. N. Rebelo

We present a search for direct CP violation in B+- -> J/psi K+- and B+- -> psi(2S) K+- decays. In a sample of 9.7 million B meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+- -> J/psi K+- and 120 B+- ->…

High Energy Physics - Experiment · Physics 2010-04-08 G. Bonvicini

We report a search for CP violation in the decay \tau- -> \pi - \K^0_S (>= 0 \pi 0) \nu_\tau\ using a dataset of 437 million \tau\ lepton pairs, corresponding to an integrated luminosity of 476 fb^{-1}, collected with the BABAR detector at…

High Energy Physics - Experiment · Physics 2013-05-30 The BABAR Collaboration

The inclusion of trilinear R-parity violating couplings in a supersymmetric theory, has monumental impacts on the phenomenology. Regarding LHC physics, we no longer expect events with a lot of missing transverse energy, but events with…

High Energy Physics - Phenomenology · Physics 2011-10-20 N. -E. Bomark , D. Choudhury , S. Lola , P. Osland

We present a new observable sensitive to a certain combination of CP violating phases in supersymmetric extensions of the Standard Model, viz. a triple product of momenta in the cascade decay of a heavy squark via an on-shell neutralino and…

High Energy Physics - Phenomenology · Physics 2008-11-26 Paul Langacker , Gil Paz , Lian-Tao Wang , Itay Yavin

We report on a search for CP violation in tau -> K^0_S pi nu_tau decays using a data sample of 699 fb^{-1} collected in the Belle experiment at the KEKB electron-positron asymmetric-energy collider. The CP asymmetry is measured in four bins…

High Energy Physics - Experiment · Physics 2015-03-17 M. Bischofberger , H. Hayashii , K. Adamczyk , H. Aihara , V. Aulchenko , A. M. Bakich , V. Balagura , E. Barberio , K. Belous , A. Bozek , M. Bracko , T. E. Browder , P. Chen , B. G. Cheon , C. -C. Chiang , I. -S. Cho , K. Cho , Y. Choi , M. Danilov , Z. Dolezal , A. Drutskoy , S. Eidelman , D. Epifanov , B. Golob , H. Ha , J. Haba , K. Hayasaka , Y. Horii , Y. Hoshi , W. -S. Hou , Y. B. Hsiung , H. J. Hyun , K. Inami , A. Ishikawa , R. Itoh , M. Iwabuchi , Y. Iwasaki , T. Julius , J. H. Kang , H. Kawai , T. Kawasaki , C. Kiesling , H. O. Kim , M. J. Kim , Y. J. Kim , K. Kinoshita , B. R. Ko , P. Kodys , P. Krizan , Y. -J. Kwon , S. -H. Kyeong , J. S. Lange , M. J. Lee , S. -H. Lee , J. Li , Y. Li , C. Liu , R. Louvot , J. MacNaughton , S. McOnie , K. Miyabayashi , H. Miyata , Y. Miyazaki , R. Mizuk , G. B. Mohanty , A. Moll , T. Mori , Y. Nagasaka , E. Nakano , M. Nakao , H. Nakazawa , S. Nishida , K. Nishimura , O. Nitoh , T. Ohshima , S. Okuno , G. Pakhlova , H. Park , H. K. Park , M. Petric , L. E. Piilonen , M. Röhrken , S. Ryu , H. Sahoo , Y. Sakai , O. Schneider , C. Schwanda , K. Senyo , M. Shapkin , J. -G. Shiu , B. Shwartz , F. Simon , P. Smerkol , Y. -S. Sohn , S. Stanic , M. Staric , T. Sumiyoshi , Y. Teramoto , K. Trabelsi , S. Uehara , T. Uglov , S. Uno , G. Varner , A. Vinokurova , A. Vossen , C. H. Wang , P. Wang , M. Watanabe , Y. Watanabe , E. Won , H. Yamamoto , Y. Yamashita , C. Z. Yuan , P. Zhou , V. Zhulanov , T. Zivko

We present new measurements of CP-violation parameters in B0->phi/Ks, K+K-Ks, f0(980)Ks, eta'Ks, omega/Ks, Pi0/Ks, and K*0(KsPi0)/gamma decays based on a sample of 275x10^6 BBbar pairs collected at the Y(4S) resonance with the Belle…

High Energy Physics - Experiment · Physics 2019-08-14 Alexei Garmash

We study a decay rate asymmetry of the top quark in the supersymmetric standard model, taking into account the constraints from the electric dipole moments of the neutron and the electron. One CP-violating phase contained in the…

High Energy Physics - Phenomenology · Physics 2009-10-31 Mayumi Aoki , Noriyuki Oshimo

CP violations in the kaon system are studied in supersymmetric SU(5) model with right-handed neutrinos. We pay a special attention to the renormalization group effect on the off-diagonal elements of the squark mass matrices. In particular,…

High Energy Physics - Phenomenology · Physics 2014-11-17 Naoyuki Akama , Yuichiro Kiyo , Shinji Komine , Takeo Moroi

Stimulated by the idea of PRISM, a very high intensity muon ring with rather low energy, we consider possibilities of observing CP-violation effects in neutrino oscillation experiments. More than 10% of CP-violation effect can be seen…

High Energy Physics - Phenomenology · Physics 2014-11-17 Masafumi Koike , Joe Sato

CP violation from physics beyond the Standard Model (SM) is investigated in the Cabbibo-suppressed decay $\tau\to K\pi\nu_{\tau}$ with polarized $\tau$ leptons, to which both the ${\rm J}^{P}=1^-$ resonance $K^*$ and the $ J^{P}=0^+$…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Y. Choi , Jake Lee , J. Song