scholarly journals Tau and muon pair production cross sections in electron-positron annihilations ats=10.58  GeV

2008 ◽  
Vol 77 (5) ◽  
Author(s):  
Swagato Banerjee ◽  
Bolek Pietrzyk ◽  
J. Michael Roney ◽  
Zbigniew Was
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Production Cross ◽  
Muon Pair ◽  
Electron Positron ◽  
Muon Pair Production

Muon pair production by electron-positron collisions in the GeV region

1972 ◽  
Vol 3 (3) ◽  
pp. 115-120 ◽  
Author(s):  
B. Borgia ◽  
F. Ceradini ◽  
M. Conversi ◽  
L. Paoluzi ◽  
R. Santonico ◽  
...  
Keyword(s):  
Pair Production ◽  
Muon Pair ◽  
Electron Positron ◽  
Positron Collisions ◽  
Muon Pair Production

scholarly journals Elastic photon-initiated production at the LHC: the role of hadron-hadron interactions

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Lucian Harland-Lang ◽  
Valeri Khoze ◽  
Mikhail G. Ryskin
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Good Control ◽  
Heavy Ion ◽  
Muon Pair ◽  
Survival Factor ◽  
Ion Collisions ◽  
Reasonable Approach ◽  
Muon Pair Production

We analyse in detail the role of additional hadron–hadron interactions in elastic photon–initiated (PI) production at the LHC, both in pp and heavy ion collisions. We first demonstrate that the source of difference between our predictions and other results in the literature for PI muon pair production is dominantly due to an unphysical cut that is imposed in these latter results on the dimuon–hadron impact parameter. We in addition show that this is experimentally disfavoured by the shape of the muon kinematic distributions measured by ATLAS in ultraperipheral PbPb collisions. We then consider the theoretical uncertainty due to the survival probability for no additional hadron–hadron interactions, and in particular the role this may play in the tendency for the predicted cross sections to lie somewhat above ATLAS data on PI muon pair production, in both pp and PbPb collisions. This difference is relatively mild, at the \sim 10\%∼10% level, and hence a very good control over the theory is clearly required. We show that this uncertainty is very small, and it is only by taking very extreme and rather unphysical variations in the modelling of the survival factor that this tension can be removed. This underlines the basic, rather model independent, point that a significant fraction of elastic PI scattering occurs for hadron–hadron impact parameters that are simply outside the range of QCD interactions, and hence this sets a lower bound on the survival factor in any physically reasonable approach. Finally, other possible origins for this discrepancy are discussed.

Muon pair production by electron-positron annihilation at 4 GeV center-of-mass energy

1973 ◽  
Vol 8 (18) ◽  
pp. 1020-1024
Author(s):  
J. Feller ◽  
A. Litke ◽  
R. Madaras ◽  
G. Hanson ◽  
J. Leong ◽  
...  
Keyword(s):  
Pair Production ◽  
Positron Annihilation ◽  
Center Of Mass ◽  
Mass Energy ◽  
Muon Pair ◽  
Center Of Mass Energy ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Muon Pair Production

New limit for the noncommutativity parameter of the noncommutative standard model

2014 ◽  
Vol 29 (32) ◽  
pp. 1450199 ◽  
Author(s):  
Linda Ghegal ◽  
Achour Benslama
Keyword(s):  
Standard Model ◽  
Pair Production ◽  
Top Quark ◽  
Muon Pair ◽  
First Order ◽  
Electron Positron ◽  
Muon Pair Production

We discuss the limits on the scale of the noncommutative (NC) parameter Λ NC via studying the top-quark pair production through electron–positron collision in the framework of the minimal noncommutative standard model (mNCSM), using the Seiberg–Witten (SW) maps to the first order of the NC parameter Θμν. In this work we assume an ansatz for the NC parameter Θμν and we find new limit on the NC scale Λ NC , which is in the range 0.1–0.2 TeV. We confirm the results obtained in muon pair production.

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