ON PION COOLING IN THE SUPERNOVA CORE

1998 ◽  
Vol 13 (06) ◽  
pp. 915-921 ◽  
Author(s):  
SUKANTA DUTTA ◽  
ASHOK GOYAL ◽  
S. R. CHOUDHURY
Keyword(s):  
Neutron Star ◽  
Dispersion Relation ◽  
Magnetic Moment ◽  
Emission Rate ◽  
Neutrino Magnetic Moment ◽  
Pion Condensation ◽  
The Core ◽  
Cooling Mechanism ◽  
Dominant Process ◽  
Model Independent

We examine the cooling mechanism of a nascent neutron star core by the emission of wrong helicity neutrinos, when the core is at the verge of pion condensation. We study the dominant process [Formula: see text] due to neutrino magnetic moment in terms of the model-independent multipole amplitudes based on dispersion relation theory. This calculation gives a more realistic emission rate for neutrinos and hence an upper bound for neutrino magnetic moment

scholarly journals Neutron star kick velocity induced by neutrino chirality flip and a lower bound for the neutrino magnetic moment

2021 ◽  
Author(s):  
Alejandro Ayala ◽  
Santiago Bernal Langarica ◽  
Saul Hernández‐Ortiz ◽  
Luis Alberto Hernández ◽  
Daryel Manreza‐Paret
Keyword(s):  
Neutron Star ◽  
Lower Bound ◽  
Magnetic Moment ◽  
Neutrino Magnetic Moment

scholarly journals HOW MAGNETIC IS THE NEUTRINO?

2007 ◽  
Vol 22 (27) ◽  
pp. 4891-4899 ◽  
Author(s):  
N. F. BELL
Keyword(s):  
Neutrino Mass ◽  
Magnetic Moment ◽  
Magnetic Moments ◽  
New Physics ◽  
Upper Bounds ◽  
Radiative Corrections ◽  
Neutrino Magnetic Moment ◽  
Majorana Neutrinos ◽  
Model Independent ◽  
Moment Bounds

The existence of a neutrino magnetic moment implies contributions to the neutrino mass via radiative corrections. We derive model-independent "naturalness" upper bounds on the magnetic moments of Dirac and Majorana neutrinos, generated by physics above the electroweak scale. For Dirac neutrinos, the bound is several orders of magnitude more stringent than present experimental limits. However, for Majorana neutrinos the magnetic moment bounds are weaker than present experimental limits if μν is generated by new physics at ~ 1 TeV , and surpass current experimental sensitivity only for new physics scales > 10 – 100 TeV . The discovery of a neutrino magnetic moment near present limits would thus signify that neutrinos are Majorana particles.

Neutrino magnetic moment and neutron star cooling

1995 ◽  
Vol 51 (2) ◽  
pp. 348-352 ◽  
Author(s):  
Naoki Iwamoto ◽  
Letao Qin ◽  
Masataka Fukugita ◽  
Sachiko Tsuruta
Keyword(s):  
Neutron Star ◽  
Magnetic Moment ◽  
Neutrino Magnetic Moment ◽  
Neutron Star Cooling

scholarly journals Probing neutrino magnetic moment at the Jinping neutrino experiment

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Baobiao Yue ◽  
Jiajun Liao ◽  
Jiajie Ling
Keyword(s):  
Magnetic Moment ◽  
Liquid Scintillator ◽  
Solar Neutrinos ◽  
Electron Neutrino ◽  
Neutrino Experiment ◽  
Neutrino Magnetic Moment ◽  
Systematic Uncertainties ◽  
Electron Recoil ◽  
Massive Neutrinos ◽  
Highly Correlated

Abstract Neutrino magnetic moment (νMM) is an important property of massive neutrinos. The recent anomalous excess at few keV electronic recoils observed by the XENON1T collaboration might indicate a ∼ 2.2 × 10−11μB effective neutrino magnetic moment ($$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff ) from solar neutrinos. Therefore, it is essential to carry out the νMM searches at a different experiment to confirm or exclude such a hypothesis. We study the feasibility of doing νMM measurement with 4 kton fiducial mass at Jinping neutrino experiment (Jinping) using electron recoil data from both natural and artificial neutrino sources. The sensitivity of $$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff can reach < 1.2 × 10−11μB at 90% C.L. with 10-year data taking of solar neutrinos. Besides the abundance of the intrinsic low energy background 14C and 85Kr in the liquid scintillator, we find the sensitivity to νMM is highly correlated with the systematic uncertainties of pp and 85Kr. Reducing systematic uncertainties (pp and 85Kr) and the intrinsic background (14C and 85Kr) can help to improve sensitivities below these levels and reach the region of astrophysical interest. With a 3 mega-Curie (MCi) artificial neutrino source 51Cr installed at Jinping neutrino detector for 55 days, it could give us a sensitivity to the electron neutrino magnetic moment ($$ {\mu}_{\nu_e} $$ μ ν e ) with < 1.1 × 10−11μB at 90% C.L. . With the combination of those two measurements, the flavor structure of the neutrino magnetic moment can be also probed at Jinping.

scholarly journals Neutron star properties and the equation of state for the core

2017 ◽  
Vol 599 ◽  
pp. A119 ◽  
Author(s):  
J. L. Zdunik ◽  
M. Fortin ◽  
P. Haensel
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
The Core

scholarly journals Nuclear equation of state and neutron star cooling

2017 ◽  
Vol 26 (04) ◽  
pp. 1750015 ◽  
Author(s):  
Yeunhwan Lim ◽  
Chang Ho Hyun ◽  
Chang-Hwan Lee
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Thermal Evolution ◽  
Observation Data ◽  
Nuclear Equation Of State ◽  
The Core ◽  
Dense Nuclear Matter ◽  
Nuclear Models

In this paper, we investigate the cooling of neutron stars with relativistic and nonrelativistic models of dense nuclear matter. We focus on the effects of uncertainties originated from the nuclear models, the composition of elements in the envelope region, and the formation of superfluidity in the core and the crust of neutron stars. Discovery of [Formula: see text] neutron stars PSR J1614−2230 and PSR J0343[Formula: see text]0432 has triggered the revival of stiff nuclear equation of state at high densities. In the meantime, observation of a neutron star in Cassiopeia A for more than 10 years has provided us with very accurate data for the thermal evolution of neutron stars. Both mass and temperature of neutron stars depend critically on the equation of state of nuclear matter, so we first search for nuclear models that satisfy the constraints from mass and temperature simultaneously within a reasonable range. With selected models, we explore the effects of element composition in the envelope region, and the existence of superfluidity in the core and the crust of neutron stars. Due to uncertainty in the composition of particles in the envelope region, we obtain a range of cooling curves that can cover substantial region of observation data.

scholarly journals Massive Gravitational Waves from Black Hole Inspirals in Quantum Gravity

2018 ◽  
Vol 191 ◽  
pp. 07003
Author(s):  
Xavier Calmet ◽  
Boris Latosh
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Quantum Gravity ◽  
Gravitational Waves ◽  
Emission Rate ◽  
New States ◽  
Model Independent ◽  
Classical Fields ◽  
Using Data

We show that alongside the already observed gravitational waves, quantum gravity predicts the existence of two additional massive classical fields and thus two new massive waves. We set a limit on their masses using data from Eöt-Wash-like experiments. We point out that the existence of these new states is a model independent prediction of quantum gravity. We explain how these new classical fields could impact astrophysical processes and in particular the binary inspirals of black holes. We calculate the emission rate of these new states in binary inspirals astrophysical processes.

Unifiable model with large neutrino magnetic moment

1992 ◽  
Vol 45 (9) ◽  
pp. 3183-3185 ◽  
Author(s):  
N. G. Deshpande ◽  
Palash B. Pal
Keyword(s):  
Magnetic Moment ◽  
Neutrino Magnetic Moment

scholarly journals Neutral current inducedπ0production and neutrino magnetic moment

2008 ◽  
Vol 78 (3) ◽  
Author(s):  
M. Sajjad Athar ◽  
S. Chauhan ◽  
S. K. Singh
Keyword(s):  
Magnetic Moment ◽  
Neutral Current ◽  
Neutrino Magnetic Moment
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