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We study a simplified model of top-flavoured dark matter in the framework of Dark Minimal Flavour Violation. In this setup the coupling of the dark matter flavour triplet to right-handed up-type quarks constitutes the only new source of…

High Energy Physics - Phenomenology · Physics 2017-06-06 Monika Blanke , Simon Kast

We study a simplified model of flavoured Majorana dark matter in the Dark Minimal Flavour Violation framework. The model extends the Standard Model by a dark matter flavour triplet and a scalar mediator, through which the new dark fermions…

High Energy Physics - Phenomenology · Physics 2023-02-15 Harun Acaroğlu , Monika Blanke

We construct a CP-violating observable which does not require flavor or CP tagging of the initial state. The proposed decay asymmetry could be measured at both threshold and non-threshold charm physics experiments and provide better…

High Energy Physics - Phenomenology · Physics 2009-11-10 Alexey A. Petrov

We search for $CP$ violation in the charged charm meson decay $D^{+}\to\pi^{+}\pi^{0}$, based on a data sample corresponding to an integrated luminosity of $\rm 921~fb^{-1}$ collected by the Belle experiment at the KEKB $e^{+}e^{-}$…

High Energy Physics - Experiment · Physics 2018-03-07 Belle Collaboration , V. Babu , K. Trabelsi , G. B. Mohanty , T. Aziz , D. Greenwald , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , R. Ayad , I. Badhrees , S. Bahinipati , A. M. Bakich , V. Bansal , P. Behera , M. Berger , V. Bhardwaj , J. Biswal , A. Bobrov , A. Bozek , M. Bračko , T. E. Browder , D. Červenkov , A. Chen , B. G. Cheon , K. Chilikin , K. Cho , Y. Choi , S. Choudhury , D. Cinabro , N. Dash , S. Di Carlo , Z. Doležal , Z. Drásal , D. Dutta , S. Eidelman , D. Epifanov , J. E. Fast , T. Ferber , B. G. Fulsom , V. Gaur , N. Gabyshev , A. Garmash , M. Gelb , P. Goldenzweig , B. Golob , Y. Guan , E. Guido , J. Haba , K. Hayasaka , H. Hayashii , M. T. Hedges , T. Horiguchi , W. -S. Hou , K. Inami , A. Ishikawa , R. Itoh , M. Iwasaki , W. W. Jacobs , H. B. Jeon , S. Jia , Y. Jin , D. Joffe , K. K. Joo , T. Julius , A. B. Kaliyar , J. H. Kang , K. H. Kang , G. Karyan , P. Katrenko , T. Kawasaki , C. Kiesling , D. Y. Kim , H. J. Kim , J. B. Kim , K. T. Kim , S. H. Kim , Y. J. Kim , K. Kinoshita , P. Kodyš , S. Korpar , D. Kotchetkov , P. Križan , R. Kroeger , P. Krokovny , T. Kuhr , R. Kulasiri , R. Kumar , A. Kuzmin , Y. -J. Kwon , J. S. Lange , L. K. Li , L. Li Gioi , J. Libby , D. Liventsev , M. Lubej , T. Luo , M. Masuda , T. Matsuda , D. Matvienko , M. Merola , K. Miyabayashi , H. Miyata , R. Mizuk , T. Mori , M. Mrvar , E. Nakano , M. Nakao , T. Nanut , K. J. Nath , Z. Natkaniec , M. Nayak , M. Niiyama , N. K. Nisar , S. Nishida , S. Ogawa , S. Okuno , H. Ono , Y. Ono , W. Ostrowicz , P. Pakhlov , G. Pakhlova , B. Pal , S. Pardi , C. S. Park , H. Park , S. Paul , R. Pestotnik , L. E. Piilonen , V. Popov , K. Prasanth , C. Pulvermacher , J. Rauch , P. K. Resmi , M. Ritter , A. Rostomyan , Y. Sakai , M. Salehi , S. Sandilya , L. Santelj , T. Sanuki , V. Savinov , O. Schneider , G. Schnell , C. Schwanda , A. J. Schwartz , Y. Seino , K. Senyo , O. Seon , I. S. Seong , M. E. Sevior , V. Shebalin , C. P. Shen , T. -A. Shibata , J. -G. Shiu , B. Shwartz , F. Simon , A. Sokolov , E. Solovieva , S. Stanič , M. Starič , J. F. Strube , M. Sumihama , T. Sumiyoshi , M. Takizawa , U. Tamponi , K. Tanida , F. Tenchini , M. Uchida , T. Uglov , Y. Unno , S. Uno , P. Urquijo , Y. Usov , S. E. Vahsen , C. Van Hulse , G. Varner , K. E. Varvell , E. Waheed , B. Wang , C. H. Wang , M. -Z. Wang , P. Wang , Y. Watanabe , E. Widmann , E. Won , H. Yamamoto , Y. Yamashita , H. Ye , C. Z. Yuan , Y. Yusa , S. Zakharov , Z. P. Zhang , V. Zhilich , V. Zhukova , V. Zhulanov , A. Zupanc

We comment on the implications of the recently measured CP asymmetry in B --> Phi K_S decay. The data disfavor the Standard Model at 2.7 sigma and -if the trend persists in the future with higher statistics - require the existence of CP…

High Energy Physics - Phenomenology · Physics 2009-11-07 Gudrun Hiller

Experimental sensitivity to CP violation in charm decay is beginning to approach the interesting regime ($\sim10^{-3}$) in which new physics may be manifest. In the early years of the 21st century, if the technical challenges can be met,…

High Energy Physics - Phenomenology · Physics 2007-05-23 Daniel M. Kaplan , Vassili Papavassiliou

Treating the MSSM as an effective theory, we study the implications of having dimension five operators in the superpotential for flavor and CP-violating processes, exploiting the linear decoupling of observable effects with respect to the…

High Energy Physics - Phenomenology · Physics 2009-11-11 Maxim Pospelov , Adam Ritz , Yudi Santoso

Recent results on searches for CP and CPT violation in the charm sector are presented. These results include limits on direct CP violation in several channels from the FOCUS and CLEO experiments. The first reported search for CPT violation…

High Energy Physics - Experiment · Physics 2007-05-23 Kevin Stenson

Measurements of CP asymmetries in B decays will soon be made at $B$ factories and hadron machines. In light of this, we review and update the profile of the CKM unitarity triangle and the resulting CP asymmetries in B decays. This is done…

High Energy Physics - Phenomenology · Physics 2007-05-23 Ahmed Ali , David London

Violation of charge conjugation-parity ($\rm CP$) symmetry plays a major rule in the dominance of matter in our universe. A kind of $\rm CP$ violation results from the asymmetry of the life time measured in $M^0$ and $\bar M^0$, here $M$ is…

High Energy Physics - Phenomenology · Physics 2019-07-11 David Delepine , Gaber Faisel , Carlos A. Ramirez

The CKM paradigm has been tested thoroughly over the last 40 years in both the neutral $K$ and $B$ systems. The recent discovery of neutral charm meson mixing has prompted the search for CP violation in $D$ decays. We discuss the prospects…

High Energy Physics - Experiment · Physics 2011-11-02 Adrian Bevan

In models of three or more scalar doublets, new CP violating phases appear in charged scalar exchange. These phases affect CP asymmetries in neutral $B$ decays, even if Natural Flavor Conservation holds. The recent upper bound on the decay…

High Energy Physics - Phenomenology · Physics 2010-11-01 Yuval Grossman , Yosef Nir

$\Dz-\Dzb$ mixing and significant CP violation in the charm system may indicate the signature of new physics. In this study, we suggest that the coherent $\DzDzb$ events from the decay of $\Upsilon(1S) \to \Dz \Dzb$ can be used to measure…

High Energy Physics - Phenomenology · Physics 2008-11-26 Hai-Bo Li , Mao-Zhi Yang

The recent LHCb measurements of the $B_s \to K^-\pi^+$ and $B_s \to K^+K^-$ rates and CP asymmetries are in agreement with U-spin expectations from $B_d \to K^+\pi^-$ and $B_d \to \pi^+\pi^-$ results. We derive the complete set of isospin,…

High Energy Physics - Phenomenology · Physics 2015-06-16 Yuval Grossman , Zoltan Ligeti , Dean J. Robinson

We consider the prospects for measuring distinctive signatures of the CP-violating phases in the minimal supersymmetric extension of the Standard Model (MSSM) in light of the limits on sparticle masses from searches at the LHC. We use the…

High Energy Physics - Phenomenology · Physics 2020-07-07 A. Arbey , J. Ellis , F. Mahmoudi

We obtain a new constraint on the CP-violating flavor mixing between the left-handed top scalar quark (\tilde{t}_L) and charm scalar quark (\tilde{c}_L), by considering a chargino loop contribution to chromo-electric dipole moment of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Motoi Endo

We review recent experimental results on D0 -D0bar mixing and CP violation charm decays. These studies provide complementary constraints on many different extensions of the Standard Model. Observation of CP violation in charm decays at the…

High Energy Physics - Experiment · Physics 2011-09-08 A. Zupanc

We study the contributions of supersymmetric models with a $U(1)$ horizontal symmetry and only spontaneous CP breaking to various lepton flavor observables, such as $\mu \to e\gamma$ and the electron electric dipole moment. We show that…

High Energy Physics - Phenomenology · Physics 2021-12-16 Daniel Aloni , Pouya Asadi , Yuichiro Nakai , Matthew Reece , Motoo Suzuki

We analyze rare charm baryon decays within the standard model and beyond. We identify all null test observables in unpolarized $\Lambda_c \to p \ell^+ \ell^-$, $\ell=e, \mu$ decays, and study the new physics sensitivities. We find that the…

High Energy Physics - Phenomenology · Physics 2022-03-31 Marcel Golz , Gudrun Hiller , Tom Magorsch

We present a general analysis for the discovery potential of CP-violation (CPV) searches in scattering processes at TeV-scale colliders in an effective field theory framework, using the SMEFT basis for higher dimensional operators. In…

High Energy Physics - Phenomenology · Physics 2024-07-30 Shaouly Bar-Shalom , Amarjit Soni , Jose Wudka
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