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We perform a global analysis of neutrino data in the framework of three massive neutrinos with non-standard neutrino interactions which affect their evolution in the matter background. We focus on the effect of NSI in the present…

High Energy Physics - Phenomenology · Physics 2019-07-24 Ivan Esteban , M. C. Gonzalez-Garcia , Michele Maltoni

Neutrino oscillations as solutions of the solar neutrino problems and the atmospheric neutrino deficits may restrict neutrino mass squared differences and mixing angles in three-neutrino mixing scheme. Currently we have several solutions…

High Energy Physics - Phenomenology · Physics 2009-10-31 Sin Kyu Kang , C. S. Kim , J. D. Kim

There is still a problem in neutrino physics related to the configuration of neutrino masses: Are neutrinos arranged by masses following the Standard Model as three generations of fundamental particles, Gen III>Gen II>Gen I, thus forming a…

High Energy Physics - Phenomenology · Physics 2021-09-06 Z. B. Todorovic

We respond to the comments of S. Sharma et al. [Phys. Rev. D 91, 038301 (2015)] on my recent paper, Y. Giraldo [Phys. Rev. D 86, 093021 (2012)]. In their comments, they begin discussing a particular class of five-zero texture…

High Energy Physics - Phenomenology · Physics 2015-06-24 Yithsbey Giraldo

In this paper, the flavor structure of quark and lepton EDMs in the SM and beyond is investigated using tools inspired from Minimal Flavor Violation. While Jarlskog-like flavor invariants are adequate for estimating CP-violation from closed…

High Energy Physics - Phenomenology · Physics 2017-07-24 Christopher Smith , Selim Touati

The problem of CP conservation and CP violation for two heavy neutrinos production in $e^+e^-$ interaction is considered. Very convenient way of parametrization of the neutrino mass matrix, from which necessary and sufficient condition for…

High Energy Physics - Phenomenology · Physics 2010-11-01 J. Gluza , M. Zralek

CP violation in the lepton mass matrix will be probed with good precision in upcoming experiments. The amount of CP violation present in oscillations can be quantified in numerous ways and is typically parameterized by the complex phase…

High Energy Physics - Phenomenology · Physics 2021-05-20 Peter B. Denton , Rebekah Pestes

As SMEFT is a framework of growing importance to analyze high-energy data, understanding its parameter space is crucial. The latter is commonly split into CP-even and CP-odd parts, but this classification is obscured by the fact that CP…

High Energy Physics - Phenomenology · Physics 2022-08-29 Quentin Bonnefoy , Emanuele Gendy , Christophe Grojean , Joshua T. Ruderman

CP violation in the field of $B$ physics is a crucial topic for exploring the quark sector and search for New Physics, both for theorists and experimentalists. CP violation manifests itself in various ways and in this presentation, we will…

High Energy Physics - Phenomenology · Physics 2024-02-16 Eleftheria Malami

We show that not only the hierarchical quark CKM mixing matrix but also the "bimaximal" lepton flavor mixing matrix can be derived from the same mass matrix ansatz based on the broken permutation symmetry, by assuming the hierarchy of…

High Energy Physics - Phenomenology · Physics 2016-09-06 C. S. Kim , J. D. Kim

Measurements of CP--violating observables in neutrino oscillation experiments have been studied in the literature as a way to determine the CP--violating phase in the mixing matrix for leptons. Here we show that such observables also probe…

High Energy Physics - Phenomenology · Physics 2010-05-28 M. C. Gonzalez-Garcia , Y. Grossman , A. Gusso , Y. Nir

Based on a neutrino mass matrix model in which a 2-3 symmetry is only broken by a phase parameter, it is investigated how the lepton mixing matrix can deviate from the so-called tribimaximal mixing under a condition that CP is maximally…

High Energy Physics - Phenomenology · Physics 2014-11-20 Yoshio Koide , Hiroyuki Nishiura

The essences of the weak CP violation, the quark and lepton Jarlskog invariants, are determined toward future model buildings beyond the Standard Model (SM). The equivalence of two calculations of Jarlskog invariants gives a bound on the CP…

High Energy Physics - Phenomenology · Physics 2020-09-09 Jihn E. Kim , Se-Jin Kim , Soonkeon Nam , Myungbo Shim

CP-violation in the quark sector has been well established over the last decade, but has not been observed in the lepton sector. We search for CP-violating decay processes in positronium, using the angular correlation of…

High Energy Physics - Experiment · Physics 2013-05-29 T. Yamazaki , T. Namba , S. Asai , T. Kobayashi

We provide a classification of generalized CP symmetries preserved by the neutrino mass matrix according to the number of zero entries in the associated transformation matrix. We determine the corresponding constrained form of the lepton…

High Energy Physics - Phenomenology · Physics 2016-08-10 Peng Chen , Gui-Jun Ding , Felix Gonzalez-Canales , J. W. F. Valle

We investigate chiral symmetry breaking and strong CP violation effects on the phase diagram of strongly interacting matter in presence of a constant magnetic field. The effect of magnetic field and strong CP violating term on the phase…

High Energy Physics - Phenomenology · Physics 2015-06-22 Bhaswar Chatterjee , Hiranmaya Mishra , Amruta Mishra

CP violation in the CKM mixing is discussed for the case of quark mass degeneracy that is approximate in the quark mass hierarchy limit. Differing from the traditional understanding of CP vanishing for degenerate masses, we find degenerate…

High Energy Physics - Phenomenology · Physics 2024-04-30 Ying Zhang

We study the CP-violating phase of the quark sector in the $U(8)$ flavor model on $T^2/Z_N \, (N=2,3,4,6)$ with non-vanishing magnetic fluxes, where properties of possible origins of the CP violation are investigated minutely. In this…

High Energy Physics - Theory · Physics 2017-04-18 Tatsuo Kobayashi , Kenji Nishiwaki , Yoshiyuki Tatsuta

Leptonic CP violation is one of the most important topics in neutrino physics. CP violation in the neutrino sector is strongly related to the nature of neutrinos: whether they are Dirac or Majorana particles. In \cite{Popov:2021icg} we have…

High Energy Physics - Phenomenology · Physics 2024-06-11 A. Popov , A. Studenikin

We find a solution to the Strong CP problem that may be testable at the LHC and future colliders. In this solution CP is broken by parity conserving terms, while parity breaking VEVs conserve CP. The quark mass matrix is Hermitian at the…

High Energy Physics - Phenomenology · Physics 2011-01-05 Ravi Kuchimanchi
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