INVESTIGATION ON THE NEUTRINO INDUCED MUONS FROM ACTIVE GALACTIC NUCLEI

2000 ◽  
Vol 15 (25) ◽  
pp. 1567-1576
Author(s):  
NAYANTARA GUPTA ◽  
D. P. BHATTACHARYYA
Keyword(s):  
Cross Sections ◽  
Neutrino Flux ◽  
High Energy ◽  
Energy Spectra ◽  
Muon Energy ◽  
Model Calculations ◽  
Charge Current ◽  
Upper Limits ◽  
Total Interaction ◽  
Interaction Cross Sections

The fluxes of neutrino induced muons at different zenith angles have been calculated using the high energy diffused neutrino spectra emitted from blazars. We have used the standard formulation developed by Gaisser based on charge-current interactions in rock and the QED-based energy loss formulation to estimate the spectra of neutrino induced muons. The energy spectra of neutrino flux generated from blazars has been taken from the model calculations of Protheroe. The latest charge-current and total interaction cross-sections at ultrahigh energies from Kwiecinski et al. have been used to find the probability of muon generation from neutrinos and the loss of neutrinos during propagation through the Earth. We find that our derived horizontal neutrino induced muon energy spectra expected from blazar model of Protheroe is comparable with the upper limits as predicted by SOUDAN 2 experiment.

scholarly journals ULTRAHIGH ENERGY NEUTRINO PHYSICS

2004 ◽  
Vol 19 (03) ◽  
pp. 317-340 ◽  
Author(s):  
ANNA M. STAŚTO
Keyword(s):  
Neutrino Physics ◽  
Cross Sections ◽  
High Energy ◽  
Ultrahigh Energy ◽  
Production Rates ◽  
Precise Knowledge ◽  
Detection Probabilities ◽  
Interaction Cross Sections ◽  
The Universe ◽  
Origin Of The Universe

Ultrahigh energy neutrinos can provide important information about the distant astronomical objects and the origin of the Universe. Precise knowledge about neutrino interactions and production rates is essential for estimating background, expected fluxes and detection probabilities. In this paper we review the applications of the high energy QCD to the calculations of the interaction cross-sections of the neutrinos. We also study the production of the ultrahigh energy neutrinos in the atmosphere due to the charm and beauty decays.

scholarly journals SEARCH FOR NEUTRINO EMISSION FROM GAMMA-RAY SOURCES WITH THE ANTARES TELESCOPE

2012 ◽  
Vol 08 ◽  
pp. 307-310
Author(s):  
C. BIGONGIARI
Keyword(s):  
Gamma Ray ◽  
Neutrino Flux ◽  
Three Dimensional ◽  
Effective Area ◽  
High Energy ◽  
Neutrino Telescope ◽  
Neutrino Detector ◽  
Upper Limits ◽  
Cosmic Neutrino ◽  
Promising Source

ANTARES is the first undersea neutrino detector ever built and presently the neutrino telescope with the largest effective area operating in the Northern Hemisphere. A three-dimensional array of photomultiplier tubes detects the Cherenkov light induced by the muons produced in the interaction of high energy neutrinos with the matter surrounding the detector. The detection of astronomical neutrino sources is one of the main goals of ANTARES. The search for point-like neutrino sources with the ANTARES telescope is described and the preliminary results obtained with data collected from 2007 to 2010 are shown. No cosmic neutrino source has been observed and neutrino flux upper limits have been calculated for the most promising source candidates.

scholarly journals Measurements of cross sections for the 209Bi(n, 4n) reaction by using high energy neutrons with continuous energy spectra

2017 ◽  
Vol 146 ◽  
pp. 11043 ◽  
Author(s):  
Kyung Joo Min ◽  
Sang-In Bak ◽  
Cheolmin Ham ◽  
Eun Jin In ◽  
Do Yoon Kim ◽  
...  
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Energy Spectra ◽  
Continuous Energy

scholarly journals High-energy neutrino interaction physics with IceCube

2019 ◽  
Vol 208 ◽  
pp. 09001
Author(s):  
Spencer Klein
Keyword(s):  
Standard Model ◽  
Cross Sections ◽  
Neutrino Flux ◽  
High Energy ◽  
Neutrino Interaction ◽  
Neutrino Telescopes ◽  
Neutrino Interactions ◽  
The Standard Model ◽  
Astrophysical Neutrinos ◽  
Neutrino Absorption

Although they are best known for studying astrophysical neutrinos, neutrino telescopes like IceCube can study neutrino interactions, at energies far above those that are accessible at accelerators. In this writeup, I present two IceCube analyses of neutrino interactions at energies far above 1 TeV. The first measures neutrino absorption in the Earth, and, from that determines the neutrino-nucleon cross-section at energies between 6.3 and 980 TeV. We find that the cross-sections are 1.30 +0.21 -0.19 (stat.) +0.39 -0.43 (syst.) times the Standard Model crosssection. We also present a measurement of neutrino inelasticity, using νμ charged-current interactions that occur within IceCube. We have measured the average inelasticity at energies from 1 TeV to above 100 TeV, and found that it is in agreement with the Standard Model expectations. We have also performed a series of fits to this track sample and a matching cascade sample, to probe aspects of the astrophysical neutrino flux, particularly the flavor ratio.

Exploring Nuclear Radii from Total Interaction Cross Sections of Medium Mass Nuclei

2009 ◽  
Author(s):  
D. Dragosavac ◽  
H. Àlvarez-Pol ◽  
J. Benlliure ◽  
B. Blank ◽  
E. Casarejos ◽  
...  
Keyword(s):  
Cross Sections ◽  
Medium Mass ◽  
Total Interaction ◽  
Interaction Cross Sections

Total Interaction Cross Sections of Several Sugars for133Ba Photons

1993 ◽  
Vol 115 (4) ◽  
pp. 300-303 ◽  
Author(s):  
K. P. Gopinathan Nair ◽  
Channe Gowda ◽  
J. Shylaja Kumari ◽  
S. J. Anasuya ◽  
T. K. Umesh ◽  
...  
Keyword(s):  
Cross Sections ◽  
Total Interaction ◽  
Interaction Cross Sections

scholarly journals Improved $$(g-2)_\mu $$ measurements and supersymmetry

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Manimala Chakraborti ◽  
Sven Heinemeyer ◽  
Ipsita Saha
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Cross Sections ◽  
Direct Detection ◽  
Production Cross ◽  
High Energy ◽  
Experimental Result ◽  
Supersymmetric Particle ◽  
Negative Results ◽  
Upper Limits

AbstractThe electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for variety of experimental data. The lighest supersymmetric particle (LSP), which we take as the lightest neutralino, $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 , can account for the observed Dark Matter (DM) content of the universe via coannihilation with the next-to-LSP (NLSP), while being in agreement with negative results from Direct Detection (DD) experiments. Owing to relatively small production cross-sections a comparably light EW sector of the MSSM is also in agreement with the unsuccessful searches at the LHC. Most importantly, the EW sector of the MSSM can account for the persistent $$3-4\,\sigma $$ 3 - 4 σ discrepancy between the experimental result for the anomalous magnetic moment of the muon, $$(g-2)_\mu $$ ( g - 2 ) μ , and its Standard Model (SM) prediction. Under the assumption that the $${\tilde{\chi }}_{1}^0$$ χ ~ 1 0 provides the full DM relic abundance we first analyze which mass ranges of neutralinos, charginos and scalar leptons are in agreement with all experimental data, including relevant LHC searches. We find an upper limit of $$\sim 600 \,\, \mathrm {GeV}$$ ∼ 600 GeV for the LSP and NLSP masses. In a second step we assume that the new result of the Run 1 of the “MUON G-2” collaboration at Fermilab yields a precision comparable to the existing experimental result with the same central value. We analyze the potential impact of the combination of the Run 1 data with the existing $$(g-2)_\mu $$ ( g - 2 ) μ data on the allowed MSSM parameter space. We find that in this case the upper limits on the LSP and NLSP masses are substantially reduced by roughly $$100 \,\, \mathrm {GeV}$$ 100 GeV . This would yield improved upper limits on these masses of $$\sim 500 \,\, \mathrm {GeV}$$ ∼ 500 GeV . In this way, a clear target could be set for future LHC EW searches, as well as for future high-energy $$e^+e^-$$ e + e -  colliders, such as the ILC or CLIC.

scholarly journals A multi-component model for observed astrophysical neutrinos

2018 ◽  
Vol 615 ◽  
pp. A168 ◽  
Author(s):  
Andrea Palladino ◽  
Walter Winter
Keyword(s):  
Gamma Ray ◽  
Probability Distributions ◽  
Neutrino Flux ◽  
Cosmic Ray ◽  
High Energy ◽  
Neutrino Energy ◽  
Point Sources ◽  
Component Model ◽  
Muon Energy ◽  
Astrophysical Neutrinos

Aims. We investigated the origin of observed astrophysical neutrinos. Methods. We propose a multi-component model for the observed diffuse neutrino flux. The model includes residual atmospheric backgrounds, a Galactic contribution (e.g., from cosmic ray interactions with gas), an extragalactic contribution from pp interactions (e.g., from starburst galaxies), and a hard extragalactic contribution from photo-hadronic interactions at the highest energies (e.g., from tidal disruption events or active galactic nuclei). Results. We demonstrate that this model can address the key problems of astrophysical neutrino data, such as the different observed spectral indices in the high-energy starting and through-going muon samples, a possible anisotropy due to Galactic events, the non-observation of point sources, and the constraint from the extragalactic diffuse gamma-ray background. Furthermore, the recently observed muon track with a reconstructed muon energy of 4.5 PeV might be interpreted as evidence for the extragalactic photo-hadronic contribution. We perform the analysis based on the observed events instead of the unfolded fluxes by computing the probability distributions for the event type and reconstructed neutrino energy. As a consequence, we give the probability of each of these astrophysical components on an event-to-event basis.

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