Astrophysical Application of Standard Model Parameters

2010 ◽  
Author(s):  
Sergey Sukhoruchkin ◽  
Jean-Michel Alimi ◽  
André Fuözfa
Keyword(s):  
Standard Model ◽  
Model Parameters ◽  
Astrophysical Application

DARK MATTER SEARCH WITH GAMMA RAYS: THE EXPERIMENTS EGRET AND GLAST

2002 ◽  
Vol 17 (12n13) ◽  
pp. 1829-1840 ◽  
Author(s):  
ALDO MORSELLI
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Gamma Rays ◽  
Galactic Center ◽  
Direct Detection ◽  
Model Parameters ◽  
Dark Matter Search

The direct detection of annihilation products in cosmic rays offers an alternative way to search for supersymmetric dark matter particles candidates. The study of the spectrum of gamma-rays, antiprotons and positrons offers good possibilities to perform this search in a significant portion of the Minimal Supersymmetric Standard Model parameters space. In particular the EGRET team have seen a convincing signal for a strong excess of emission from the galactic center that have not easily explanation with standard processes. We will review the achievable limits with the experiment GLAST taking into accounts the LEP results and we will compare this method with the antiproton and positrons experiments, the direct underground detection and with future experiments at LHC.

scholarly journals Trying to understand the standard model parameters

2003 ◽  
Vol 18 (1-4) ◽  
pp. 55-75 ◽  
Author(s):  
C.D. Froggatt* ◽  
H.B. Nielsen†
Keyword(s):  
Standard Model ◽  
Model Parameters ◽  
The Standard Model

scholarly journals mr : A C++ library for the matching and running of the Standard Model parameters

2016 ◽  
Vol 206 ◽  
pp. 84-96 ◽  
Author(s):  
Bernd A. Kniehl ◽  
Andrey F. Pikelner ◽  
Oleg L. Veretin
Keyword(s):  
Standard Model ◽  
Model Parameters ◽  
The Standard Model

scholarly journals Standard model parameters in the tadpole-free pure MS¯ scheme

2019 ◽  
Vol 100 (7) ◽  
Author(s):  
Stephen P. Martin ◽  
David G. Robertson
Keyword(s):  
Standard Model ◽  
Model Parameters ◽  
Ms Scheme

scholarly journals QCD PRECISION MEASUREMENTS AND STRUCTURE FUNCTION EXTRACTION AT A HIGH STATISTICS, HIGH ENERGY NEUTRINO SCATTERING EXPERIMENT: NuSOnG

2010 ◽  
Vol 25 (05) ◽  
pp. 909-949 ◽  
Author(s):  
T. ADAMS ◽  
P. BATRA ◽  
L. BUGEL ◽  
L. CAMILLERI ◽  
J. M. CONRAD ◽  
...  
Keyword(s):  
Standard Model ◽  
Energy Shift ◽  
High Energy ◽  
Structure Functions ◽  
Distribution Functions ◽  
Neutrino Beam ◽  
Model Parameters ◽  
Parton Distribution Functions ◽  
Neutrino Scattering ◽  
Scattering Experiment

We extend the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering On Glass) to address a variety of issues including precision QCD measurements, extraction of structure functions, and the derived Parton Distribution Functions (PDF's). This experiment uses a Tevatron-based neutrino beam to obtain a sample of Deep Inelastic Scattering (DIS) events which is over two orders of magnitude larger than past samples. We outline an innovative method for fitting the structure functions using a parametrized energy shift which yields reduced systematic uncertainties. High statistics measurements, in combination with improved systematics, will enable NuSOnG to perform discerning tests of fundamental Standard Model parameters as we search for deviations which may hint of "Beyond the Standard Model" physics.

Searches for Technicolor Particles at DØ

2005 ◽  
Vol 20 (15) ◽  
pp. 3302-3304
Author(s):  
LORENZO FELIGIONI
Keyword(s):  
Standard Model ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Model Parameters ◽  
Decay Channels ◽  
Upper Limit ◽  
200 Gev ◽  
Quark Jets ◽  
B Quark

We present preliminary results of searches for technirho (ρT) and techniomega (ωT) particles, using the decay channels (ρT), ωT → e+e- and [Formula: see text], where [Formula: see text], [Formula: see text]. These searches are based respectively on 200 pb-1 and 238 pb-1 of data collected in Run II of the Fermilab Tevatron. We select events with b–quark jets by identifying secondary vertices in the jets. We interpret our findings in terms of limits on the production of particles predicted by extended technicolor models. For the WπT analysis, in the absence of an excess over standard model background, we compute a 95% C.L. upper limit on the techniparticle production cross section for the mass combination m(ρT) = 200 GeV and m(πT) = 105 GeV of 6.4 pb. In the e+e- channel, for certain model parameters, we exclude the existence of degenerate ρT and ωT states with masses below 367 GeV; the most restrictive constraints on dilepton technicolor decays to date.

scholarly journals Precision Electroweak Data: Present Status and Future Prospects

1997 ◽  
Vol 12 (23) ◽  
pp. 4109-4154 ◽  
Author(s):  
Peter B. Renton
Keyword(s):  
Standard Model ◽  
Present Status ◽  
Model Parameters ◽  
Second Phase ◽  
Independent Variables ◽  
The Standard Model ◽  
Model Independent ◽  
The Impact ◽  
Precision Electroweak Data

The present status of precision electroweak data is reviewed. These data include LEP measurements of the mass and width of the Z, together with various measurements on the Z-fermion couplings. These data are compared to, and combined with, data from the SLC on the left–right polarized asymmetry, A LR , and the left–right forward–backward asymmetries for b and c quarks. These measurements are combined with hadron collider measurements from the Tevatron and CERN on the mass of the W boson, mW, as well as other electroweak data, in global electroweak fits in which various Standard Model parameters are determined. A comparison is made between the results of direct measurements of mW and the top-quark mass, mt, as determined from the Tevatron, with the indirect results coming from electroweak radiative corrections. Using all precision electroweak data, fits are also made to determine limits on the mass of the Higgs boson, mH. The influence on these limits of specific measurements, particularly those which are somewhat inconsistent with the Standard Model, is explored. The data are also analyzed in terms of the quasi model independent ∊ variables. Improvements in the determination of all of these quantities are expected when the Z data at LEP are fully analyzed, and further measurements on A LR and related asymmetries performed at the SLC. In addition, substantial improvements in the determination of mW are expected from measurements at the Tevatron and in the second phase of LEP. An estimate is made of the likely precision of these data, and the implications of the impact of these data on precision electroweak tests are discussed. This discussion is made both in terms of the Standard Model and also in the context of the quasi model independent ∊ variables.

scholarly journals Self-Organized Criticality and Standard Model Parameters

2020 ◽  
Author(s):  
Ervin Goldfain
Keyword(s):  
Dynamical Systems ◽  
Standard Model ◽  
Metastable States ◽  
Model Parameters ◽  
Complex Behavior ◽  
Mixing Angles ◽  
Universal Scaling ◽  
Self Organized ◽  
Self Organized Criticality

As paradigm of complex behavior, Self-organized Criticality (SOC) reflects the ability of nonequilibrium dynamical systems to self-adjust into metastable states that are scale independent. The goal of this report is to tentatively show that the hierarchy of Standard Model masses and mixing angles follows from the universal scaling attributes of SOC.

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