scholarly journals $H \to \gamma\gamma$ search and direct photon pair production differential cross section

2010 ◽  
Author(s):  
Xuebing Bu
Keyword(s):  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Differential Cross ◽  
Direct Photon ◽  
Photon Pair

scholarly journals Top Quark Pair-Production in Noncommutative Standard Model

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
M. Fisli ◽  
N. Mebarki
Keyword(s):  
Lower Bound ◽  
Standard Model ◽  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Differential Cross ◽  
Top Quark ◽  
Tree Level ◽  
Hadron Collision ◽  
Geometry Parameter

The differential cross-section of the top quark pair production via the quark-antiquark annihilation subprocess in hadron collision is calculated within the noncommutative standard model. A pure NC analytical expression for the forward-backward asymmetry at the tree level is obtained. Moreover, using recent Tevatron results from the full RUN2 data, a new lower bound on the noncommutative geometry parameter is deduced.

Pair production by muons in the field of nuclei

1968 ◽  
Vol 46 (10) ◽  
pp. S387-S390 ◽  
Author(s):  
S. R. Kelner ◽  
Yu. D. Kotov
Keyword(s):  
Numerical Calculation ◽  
Differential Cross Section ◽  
Energy Loss ◽  
Pair Production ◽  
Cross Section ◽  
Differential Cross ◽  
Muon Energy ◽  
Fermi Model ◽  
Electron Pairs ◽  
Analytical Expressions

The differential cross section for the production of electron pairs by muons has been obtained under the assumption that all particles are relativistic and that the Thomas–Fermi model can be used to evaluate the effect of screening. Analytical expressions have been obtained for the energy loss of muons by pair production for the two extreme cases of "no screening" and "complete screening". Results of numerical calculation of energy loss by this process are given as a function of muon energy, for rock with Z = 11.

scholarly journals Measurement of the differential cross sections for isolated direct photon pair production in pp¯ collisions at s=1.96 TeV

2013 ◽  
Vol 725 (1-3) ◽  
pp. 6-14 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
B.S. Acharya ◽  
M. Adams ◽  
T. Adams ◽  
...  
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Differential Cross ◽  
Direct Photon ◽  
Photon Pair ◽  
Differential Cross Sections

Second Born approximation to the Bremsstrahlung differential cross-section

1959 ◽  
Vol 253 (1272) ◽  
pp. 103-120 ◽  
Keyword(s):  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Coulomb Potential ◽  
Differential Cross ◽  
Born Approximation ◽  
Yukawa Potential ◽  
Final States ◽  
The Cross ◽  
Cross Section Differential

In this paper we calculate the second Born approximation contribution to the Bremsstrahlung cross-section differential in both the photon and electron angles. This is divergent if a Coulomb potential is considered, but it is found, on following the idea of Dalitz (1951), that all observable quantities turn out to be finite when we perform the calculation for a Yukawa potential and take the limit of zero screening. It is shown that this is true to order Z 3 in the differential cross-section before it is averaged over spins, and the cross-section is calculated explicitly for the case of an unpolarized beam when the final states of polarization are not observed. Further, it is pointed out that the same methods can be applied satisfactorily in the case of pair production.

scholarly journals Effect of differential cross section in Breit–Wheeler pair production

2018 ◽  
Vol 60 (10) ◽  
pp. 104001 ◽  
Author(s):  
X Ribeyre ◽  
E d’Humières ◽  
S Jequier ◽  
V T Tikhonchuk
Keyword(s):  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Differential Cross

POSSIBLE DEVIATIONS IN Z0 PAIR PRODUCTION AT e+e− COLLIDERS DUE TO EXOTIC LEPTON MIXINGS

1990 ◽  
Vol 05 (08) ◽  
pp. 605-612
Author(s):  
A.K. NAGAWAT ◽  
SARDAR SINGH ◽  
N.K. SHARMA
Keyword(s):  
Standard Model ◽  
Differential Cross Section ◽  
Pair Production ◽  
Cross Section ◽  
Differential Cross ◽  
Linear Collider ◽  
Longitudinal Polarization ◽  
Polarization Asymmetry ◽  
Distinctive Features ◽  
Model Predictions

The deviations from standard model predictions for the pair production of Z0 at e+e− colliders with the inclusion of mixing between ordinary and exotic leptons are evaluated for (i) the differential cross section and (ii) the longitudinal polarization asymmetry at LEP II [Formula: see text] and at possible the next linear collider [Formula: see text] energies. For heavy exotic leptons (mE ~ 250 GeV) the deviations have distinctive features that could allow the possibility of distinguishing between mirror, vector-doublet and vector-singlet type of exotic lepton mixings.

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