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Developments of main notions and concepts behind the MSW effect (1978 - 1985) are described. They include (i) neutrino refraction, matter potential, and evolution equation in matter, (ii) mixing in matter, resonance and level crossing;…

High Energy Physics - Phenomenology · Physics 2019-02-05 A Y Smirnov

We investigate matter-enhanced Mikheyev-Smirnov-Wolfenstein (MSW) active-sterile neutrino conversion in the $\nu_e \rightleftharpoons \nu_s$ channel in the collapse of the iron core of a pre-supernova star. For values of sterile neutrino…

Astrophysics · Physics 2008-11-26 Jun Hidaka , George M. Fuller

The MSW (Mikheyev-Smirnov-Wolfenstein) effect is the effect of transformation of one neutrino species (flavor) into another one in a medium with varying density. Three basic elements of the effect include: the refraction of neutrinos in…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Yu. Smirnov

Flavor transition mechanisms of supernova (SN) neutrinos during their propagation deserve a close scrutiny. We present a method to verify Mikheyev-Smirnov-Wolfenstein (MSW) effect during the propagation of SN neutrinos from the SN core to…

High Energy Astrophysical Phenomena · Physics 2023-03-14 Kwang-Chang Lai , C. S. Jason Leung , Guey-Lin Lin

The MSW (Mikheyev-Smirnov-Wolfenstein) effect is the adiabatic or partially adiabatic neutrino flavor conversion in medium with varying density. The main notions related to the effect, its dynamics and physical picture are reviewed. The…

High Energy Physics - Phenomenology · Physics 2009-11-10 A. Yu. Smirnov

The Lorentz invariant formalism for description of neutrino flavour oscillations in moving matter is developed. It is shown that the matter motion with relativistic speed can sufficiently change the matter term in the neutrino effective…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Grigoriev , A. Lobanov , A. Studenikin

We present a systematic analysis of the three-flavor Mikheyev-Smirnov-Wolfenstein (MSW) oscillation solutions to the solar neutrino problem, in the hypothesis that the two independent neutrino square mass differences, $\delta m^2$ and…

High Energy Physics - Phenomenology · Physics 2009-10-07 G. L. Fogli , E. Lisi , D. Montanino

We solve the problem of coherent Mikheyev-Smirnov-Wolfenstein (MSW) resonant active-to-sterile neutrino flavor conversion driven by an initial lepton number in the early universe. We find incomplete destruction of lepton number in this…

Astrophysics · Physics 2007-05-23 Chad T. Kishimoto , George M. Fuller , Christel J. Smith

We present the currently most accurate evaluation of the W boson mass, M_W, in the Minimal Supersymmetric Standard Model (MSSM). The full complex phase dependence at the one-loop level, all available MSSM two-loop corrections as well as the…

High Energy Physics - Phenomenology · Physics 2010-02-03 S. Heinemeyer , W. Hollik , D. Stockinger , A. M. Weber , G. Weiglein

Extending the Standard Model (SM) with three right-handed neutrinos, the type-I seesaw model serves as the simplest and most natural scenario to successfully explain both tiny neutrino masses and the baryon number asymmetry in the Universe.…

High Energy Physics - Phenomenology · Physics 2026-01-06 Jihong Huang , Shun Zhou

Matter-induced neutrino flavor mixing (the Mikheyev-Smirnov-Wolfenstein, or MSW, effect) is a central prediction of the neutrino mixing framework, but it has not been conclusively observed. Direct observation of the energy-dependent MSW…

High Energy Physics - Phenomenology · Physics 2026-02-02 Obada Nairat , John F. Beacom , Kevin J. Kelly , Shirley Weishi Li

We point out that the recent data from the Sudbury Neutrino Observatory, together with other relevant measurements from solar and reactor neutrino experiments, convincingly show that the flavor transitions of solar neutrinos are affected by…

High Energy Physics - Phenomenology · Physics 2009-10-07 G. L. Fogli , E. Lisi , A. Marrone , A Palazzo

We revisit the flavor composition of neutrinos from core-collapse supernovae (SN), focusing on robust predictions that are insensitive to the poorly known dynamics of collective flavor conversion in the inner core. Assuming that the many…

High Energy Physics - Phenomenology · Physics 2025-12-22 Antonio Capanema , Yago Porto , Maria Manuela Saez

A simple closed-form analytic expression for the probability of two-flavour neutrino oscillations in a matter with an arbitrary density profile is derived. Our formula is based on a perturbative expansion and allows an easy calculation of…

High Energy Physics - Phenomenology · Physics 2009-01-14 E. Kh. Akhmedov , Viviana Niro

We review the main results of the one-loop radiative corrections from the neutrino/sneutrino sector to the lightest Higgs boson mass, M_h, within the context of the so-called MSSM-seesaw scenario where right handed neutrinos and their…

High Energy Physics - Phenomenology · Physics 2011-07-04 S. Heinemeyer , M. J. Herrero , S. Penaranda , A. M. Rodriguez-Sanchez

The neutrino masses and mixings are studied in the model which is the supersymmetric extension of the standard model with local gauged baryon and lepton numbers(BLMSSM). At tree level the neutrinos can obtain tiny masses through the See-Saw…

High Energy Physics - Phenomenology · Physics 2016-08-03 Shu-Min Zhao , Tai-Fu Feng , Xing-Xing Dong , Hai-Bin Zhang , Guo-Zhu Ning , Tao-Guo

We present a full diagrammatic computation of the one-loop corrections from the neutrino/sneutrino sector to the renormalized neutral CP-even Higgs boson self-energies and the lightest Higgs boson mass, Mh, within the context of the…

High Energy Physics - Phenomenology · Physics 2011-05-27 S. Heinemeyer , M. J. Herrero , S. Penaranda , A. M. Rodriguez-Sanchez

The $\mu\nu$SSM is a simple supersymmetric extension of the Standard Model (SM) capable of predicting neutrino physics in agreement with experiment. In this paper we perform the complete one-loop renormalization of the neutral scalar sector…

High Energy Physics - Phenomenology · Physics 2018-06-21 T. Biekötter , S. Heinemeyer , C. Muñoz

We present a theory of neutrino oscillations in a dense medium which goes beyond the effective matter potential used in the description of the MSW effect. We show how the purity of the neutrino state is degraded by neutrino interactions…

High Energy Physics - Phenomenology · Physics 2021-07-20 Antonio Capolupo , Salvatore Marco Giampaolo , Aniello Quaranta

The complete O(\alpha) corrections including soft-photon bremsstrahlung to the process e^+ e^- -> W^+ W^- in the MSSM are calculated for on-shell W bosons. The relative difference between the MSSM and Standard Model corrections is generally…

High Energy Physics - Phenomenology · Physics 2009-10-31 T. Hahn
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