Neutrino Pair Production in Bound-Bound Transitions

1966 ◽  
Vol 151 (4) ◽  
pp. 1189-1191
Author(s):  
Gary Steigman
Keyword(s):  
Pair Production ◽  
Neutrino Pair

scholarly journals Signs of new physics in top quark pair production associated with a neutrino pair at the LHC

2020 ◽  
Vol 101 (9) ◽  
Author(s):  
Daruosh Haji Raissi ◽  
Javad Ebadi ◽  
Mojtaba Mohammadi Najafabadi
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
New Physics ◽  
Neutrino Pair

scholarly journals Consequences of Massive Neutrino to Astrophysics and Cosmology

2020 ◽  
pp. 50-58
Author(s):  
E. Comay
Keyword(s):  
Pair Production ◽  
Weak Interactions ◽  
Big Bang ◽  
Low Energy ◽  
Electromagnetic Interactions ◽  
Pair Annihilation ◽  
Massive Spin ◽  
Charged Pions ◽  
Neutrino Pair ◽  
The Big Bang

It is now recognized that a neutrino is a massive spin-1/2 particle. Consequently, neutrino- antineutrino pair production and their pair annihilation are theoretically valid processes. The data prove that the strength of weak interactions increases with collision energy. Therefore, a neutrino pair production event is expected to be a significant process in the region which is just outside the event horizon of a black hole. Another neutrino source is the pair production of particles like muons and charged pions whose decay produces neutrinos. Similarly, copious neutrino pair production events are expected to take place right after the big bang. Since a neutrino does not directly participate in electromagnetic interactions, its pair annihilation cannot directly produce photons. For this reason, a low energy neutrino-antineutrino collision can only go to another neutrino-antineutrino pair. It follows that the number of low energy neutrinos increases with time. This effect may contribute to the problem of the missing mass of the universe.

scholarly journals Higgs-mediated heavy neutrino pair-production at pp supercolliders

1993 ◽  
Vol 308 (3-4) ◽  
pp. 394-402 ◽  
Author(s):  
Debajyoti Choudhury ◽  
Rohini M. Godbole ◽  
Probir Roy
Keyword(s):  
Pair Production ◽  
Heavy Neutrino ◽  
Neutrino Pair

scholarly journals Simulating hard photon production with Whizard

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
J. Kalinowski ◽  
W. Kotlarski ◽  
P. Sopicki ◽  
A. F. Żarnecki
Keyword(s):  
Dark Matter ◽  
Pair Production ◽  
Cross Sections ◽  
New Physics ◽  
Hard Photon ◽  
Initial State ◽  
Flexible Tool ◽  
Bhabha Scattering ◽  
State Radiation ◽  
Neutrino Pair

Abstract One of the important goals of the proposed future $$\hbox {e}^{+}\hbox {e}^{-}$$e+e- collider experiments is the search for dark matter particles using different experimental approaches. The most general search approach is based on the mono-photon signature, which is expected when production of the invisible final state is accompanied by a hard photon from initial state radiation. Analysis of the energy spectrum and angular distributions of those photons can shed light on the nature of dark matter and its interactions. Therefore, it is crucial to be able to simulate the signal and background samples in a uniform framework, to avoid possible systematic biases. The Whizard program is a flexible tool, which is widely used by $$\hbox {e}^{+}\hbox {e}^{-}$$e+e- collaborations for simulation of many different “new physics” scenarios. We propose the procedure of merging the matrix element calculations with the lepton ISR structure function implemented in Whizard. It allows us to reliably simulate the mono-photon events, including the two main Standard Model background processes: radiative neutrino pair production and radiative Bhabha scattering. We demonstrate that cross sections and kinematic distributions of mono-photon in neutrino pair-production events agree with corresponding predictions of the $$\mathcal{KK}$$KK MC, a Monte Carlo generator providing perturbative predictions for SM and QED processes, which has been widely used in the analysis of LEP data.

scholarly journals EMISSIVITY OF NEUTRINOS IN SUPERNOVA IN A LEFT–RIGHT SYMMETRIC MODEL

2010 ◽  
Vol 25 (12) ◽  
pp. 2551-2560 ◽  
Author(s):  
A. GUTIÉRREZ-RODRÍGUEZ ◽  
E. TORRES-LOMAS ◽  
A. GONZÁLEZ-SÁNCHEZ
Keyword(s):  
Energy Loss ◽  
Pair Production ◽  
Symmetric Model ◽  
Loss Mechanism ◽  
Mixing Angle ◽  
Efficient Energy ◽  
Energy Loss Mechanism ◽  
Neutrino Pair

We calculate the emissivity due to neutrino-pair production in e+e- annihilation in the context of a left–right symmetric model in a way that can be used in supernova calculations. We also present some simple estimates which show that such process can act as an efficient energy-loss mechanism in the shocked supernova core. We find that the emissivity is dependent on the mixing angle ϕ of the model in the allowed range for this parameter.

scholarly journals : Event generator for the single- and double-photon emission associated with neutrino pair-production

2001 ◽  
Vol 136 (3) ◽  
pp. 250-268 ◽  
Author(s):  
Y. Kurihara ◽  
J. Fujimoto ◽  
T. Ishikawa ◽  
Y. Shimizu ◽  
T. Munehisa
Keyword(s):  
Pair Production ◽  
Photon Emission ◽  
Event Generator ◽  
Neutrino Pair

Neutrino pair production in e+e- collision; a method for neutrino distinction and family counting

1982 ◽  
Vol 35 (13) ◽  
pp. 423-426
Author(s):  
H. Konashi ◽  
K. Konashi ◽  
K. Shigemoto
Keyword(s):  
Pair Production ◽  
Neutrino Pair

Neutrino-pair production by photons

1971 ◽  
Vol 2 (2) ◽  
pp. 359-383 ◽  
Author(s):  
L. F. Landovitz ◽  
W. M. Schreiber
Keyword(s):  
Pair Production ◽  
Neutrino Pair
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