scholarly journals Probing WWγ coupling through e−γ → νeW− at ILC

2015 ◽  
Vol 30 (36) ◽  
pp. 1550215 ◽  
Author(s):  
Satendra Kumar ◽  
P. Poulose
Keyword(s):  
Electron Beam ◽  
Cross Section ◽  
Center Of Mass ◽  
Angular Distributions ◽  
Mass Energy ◽  
Final State ◽  
Center Of Mass Energy ◽  
Fixed Energy ◽  
Interesting Possibility ◽  
Unpolarized Electron

The anomalous [Formula: see text] coupling is probed through [Formula: see text] at the ILC. With a spectacular single lepton final state, this process is well suited to study the above coupling. Cross-section measurements can probe [Formula: see text] to about [Formula: see text] for a luminosity of 100 fb[Formula: see text] at 500 GeV center-of-mass energy with unpolarized electron beam. The limits derivable on [Formula: see text] from the total cross-section are comparatively more relaxed. Exploiting the energy-angle double distribution of the secondary muons, kinematic regions sensitive to these couplings are identified. The derivable limit on [Formula: see text] could be improved to a few per-mil, focusing on such regions. More importantly, the angular distributions at fixed energy values, and energy distribution at fixed angles present very interesting possibility of distinguishing the case of [Formula: see text] and [Formula: see text].

scholarly journals Virtual corrections to gg → ZH via a transverse momentum expansion

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Lina Alasfar ◽  
Giuseppe Degrassi ◽  
Pier Paolo Giardino ◽  
Ramona Gröber ◽  
Marco Vitti
Keyword(s):  
Transverse Momentum ◽  
Cross Section ◽  
Center Of Mass ◽  
Gluon Fusion ◽  
Partonic Cross Section ◽  
Mass Energy ◽  
Final State ◽  
Center Of Mass Energy ◽  
Total Hadronic Cross Section ◽  
Better Than

Abstract We compute the next-to-leading virtual QCD corrections to the partonic cross section of the production of a Higgs boson in association with a Z boson in gluon fusion. The calculation is based on the recently introduced method of evaluating the amplitude via an expansion in terms of a small transverse momentum. We generalize the method to the case of different masses in the final state and of a process not symmetric in the forward-backward direction exchange. Our analytic approach gives a very good approximation (better than percent) of the partonic cross section in the center of mass energy region up to ∼ 750 GeV, where at the LHC ∼ 98% of the total hadronic cross section is concentrated.

THE e e Z l l bb + − − + → →  COLLISION IN THE RANDALL-SUNDRUM MODEL

2021 ◽  
Vol 66 (3) ◽  
pp. 61-68
Author(s):  
Giang Bui Thi Ha
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Center Of Mass ◽  
Model Parameters ◽  
Mass Energy ◽  
Final State ◽  
Center Of Mass Energy ◽  
Linear Colliders

Taking account of the Randall-Sundrum model, we have evaluated the influence of model parameters in e e Z l l bb + − − + → →  collision at International Linear Colliders (ILC). In the ILC region, the total cross-section is enhanced at the 125 GeV radion. The total cross-section depends on the polarization of e e − + , initial beams, the radion mass m , the center of mass energy s . Based on the forward - backward asymmetry and the polarization of beams, the reaction can give observable cross-sections based on l l bb − + final state.

scholarly journals The total hadronic cross section for e+e− annihilation between 3.1 and 4.8 GeV center of mass energy

1977 ◽  
Vol 66 (4) ◽  
pp. 395-400 ◽  
Author(s):  
J. Burmester ◽  
L. Criegee ◽  
H.C. Dehne ◽  
K. Derikum ◽  
R. Devenish ◽  
...  
Keyword(s):  
Cross Section ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Hadronic Cross Section ◽  
Total Hadronic Cross Section

scholarly journals Search for a heavy Higgs boson decaying into two lighter Higgs bosons in the ττbb final state at 13 TeV

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
◽  
A. Tumasyan ◽  
W. Adam ◽  
J. W. Andrejkovic ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Branching Fractions ◽  
Center Of Mass ◽  
Final State ◽  
Signal Process ◽  
Center Of Mass Energy ◽  
Heavy Higgs Boson

Abstract A search for a heavy Higgs boson H decaying into the observed Higgs boson h with a mass of 125 GeV and another Higgs boson hS is presented. The h and hS bosons are required to decay into a pair of tau leptons and a pair of b quarks, respectively. The search uses a sample of proton-proton collisions collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb−1. Mass ranges of 240–3000 GeV for mH and 60–2800 GeV for $$ {m}_{{\mathrm{h}}_{\mathrm{S}}} $$ m h S are explored in the search. No signal has been observed. Model independent 95% confidence level upper limits on the product of the production cross section and the branching fractions of the signal process are set with a sensitivity ranging from 125 fb (for mH = 240 GeV) to 2.7 fb (for mH = 1000 GeV). These limits are compared to maximally allowed products of the production cross section and the branching fractions of the signal process in the next-to-minimal supersymmetric extension of the standard model.

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