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I review the implications of recent measurements of CP violation in D meson decays in the context of standard model extensions. Using effective theory methods, one can derive significant constraints on the possible non-standard…

高能物理 - 唯象学 · 物理学 2013-02-18 Jernej F. Kamenik

The LHCb collaboration recently announced preliminary evidence for CP violation in D meson decays. We discuss this result in the context of the standard model (SM), as well as its extensions. In the absence of reliable methods to evaluate…

高能物理 - 唯象学 · 物理学 2012-03-23 Gino Isidori , Jernej F. Kamenik , Zoltan Ligeti , Gilad Perez

Recent improvements to the limit of Delta M_{B_s} imply that pure superweak theories, while not excluded, no longer provide a good fit to the data. A class of general superweak theories is introduced in which all flavor changing…

高能物理 - 唯象学 · 物理学 2009-10-30 Riccardo Barbieri , Lawrence Hall , Achille Stocchi , Neal Weiner

The CDF and LHCb experiments have recently provided two intriguing hints for new physics: a large forward-backward asymmetry in $t\bar t$ production, and a direct CP asymmetry in D decays of order a percent. In both cases, flavor…

高能物理 - 唯象学 · 物理学 2013-05-30 Yonit Hochberg , Yosef Nir

The discovery of CP violation in charm sector in 2019 was a milestone in searches performed over last decades. The $\Delta A_{CP}$ measured by LHCb is at the upper end of the Standard Model predictions. This triggers many interpretations…

高能物理 - 实验 · 物理学 2024-04-01 Jolanta Brodzicka

The violation of the Charge-Parity (CP) symmetry is a phenomenon described by the Standard Model (SM), however, its predictions for this violation are not enough to explain the matter-antimatter asymmetry in the visible universe.…

高能物理 - 唯象学 · 物理学 2024-08-29 Felipe Cesário Laterza Lopes , Patrícia Camargo Magalhães

We review CP violation in various extensions of the electroweak sector of the Standard Model. A particular emphasis is put on supersymmetric models. We describe the two CP problems of supersymmetry, concerning $d_N$ and $\epsilon_K$. We…

高能物理 - 唯象学 · 物理学 2016-11-03 Yuval Grossman , Yosef Nir , Riccardo Rattazzi

Supersymmetric models with a high supersymmetry breaking scale give, in general, large contributions to epsilon_K and/or to various electric dipole moments, even when contributions to CP conserving, flavor changing processes are…

高能物理 - 唯象学 · 物理学 2014-11-17 Michael Dine , Erik Kramer , Yosef Nir , Yael Shadmi

We discuss the discovery potential for New Physics of various measurements of CP violation. If nature is supersymmetric, then the flavor problem is even more mysterious than in the standard model. We show how we can learn about the…

高能物理 - 唯象学 · 物理学 2007-05-23 Yosef Nir

The CP violation of the neutral $B$ meson is the important phenomenon to search for the new physics. The like-sign dimuon charge asymmetry observed by the D$\O$ Collaboration indicates the CP-violating new physics in the $B_s-\bar B_s$…

高能物理 - 唯象学 · 物理学 2015-06-04 Atsushi Hayakawa , Yusuke Shimizu , Morimitsu Tanimoto , Kei Yamamoto

Observation in astronomy suggests that our Universe contains an abundance of matter over antimatter, which can only be explained if the combined CP symmetry is violated. Studies of CP violation have driven the flavor physics with the aim of…

高能物理 - 实验 · 物理学 2023-02-21 Xinchen Dai , Miroslav Saur , Yiduo Shang , Xueting Yang , Yanxi Zhang

CP violation plays a privileged role in our quest for new physics beyond the electroweak standard model (SM). In the SM the violation of CP in the weak interactions has a single source: the phase of the quark mixing matrix (the CKM matrix,…

高能物理 - 唯象学 · 物理学 2014-11-17 A. Masiero , O. Vives

CP violation in hadronic B-decays is studied in a definite and well motivated framework of flavour physics and supersymmetry. Possible deviations from the standard model both in mixing and in decay amplitudes are discussed. An attempt is…

高能物理 - 唯象学 · 物理学 2009-10-09 Riccardo Barbieri , Alessandro Strumia

We present an analysis of low energy CP violating observables in the Minimal Supersymmetric Standard Model (MSSM). We focus on the predictions of CP violation in b -> s transitions in the framework of a flavor blind MSSM, where the CKM…

高能物理 - 唯象学 · 物理学 2015-05-14 Wolfgang Altmannshofer

Recent evidence for direct CP violation in non-leptonic charm decays cannot be easily accommodated within the Standard Model (SM). On the other hand, it fits well in new physics models generating CP violating Delta C=1 chromomagnetic dipole…

高能物理 - 唯象学 · 物理学 2012-11-06 Gino Isidori , Jernej F. Kamenik

We analyze the low energy implications of a flavor blind supersymmetric scenario (where the CKM matrix is the only source of flavor violation) in the presence of new CP violating but flavor conserving phases in the soft sector. We find that…

高能物理 - 唯象学 · 物理学 2010-05-12 W. Altmannshofer , A. J. Buras , P. Paradisi

We study the flavor physics implications of baryogenesis in the Minimal Supersymmetric Standard Model. Enhanced $B-\bar B$ mixing and $b \to s \gamma$ rates are generic to all scenarios. Depending on the origin of the CP violating phase…

高能物理 - 唯象学 · 物理学 2009-10-30 Mihir P. Worah

Motivated by recent indications that the rates of colour-allowed non-leptonic channels are not in agreement with their Standard Model expectations based on QCD factorisation, we investigate the potential to study CP asymmetries with these…

高能物理 - 唯象学 · 物理学 2022-06-29 Tim Gershon , Alexander Lenz , Aleksey V. Rusov , Nicola Skidmore

We address the question of the relation between supersymmetry breaking and the origin of flavor in the context of CP violating phenomena. We prove that, in the absence of the Cabibbo-Kobayashi-Maskawa phase, a general Minimal Supersymmetric…

高能物理 - 唯象学 · 物理学 2009-10-31 D. A. Demir , A. Masiero , O. Vives

The CKM matrix is the only source of CP violation in the Standard Model.Heavy-flavour decays provide an ideal laboratory to test the CKM mechanism. Some recent highlights in CP violation in heavy-flavour decays from the LHCb and Belle II…

高能物理 - 实验 · 物理学 2023-10-27 Yuehong Xie
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