scholarly journals Electroweak Effects in e+e−→ZH Process

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1256
Author(s):  
Andrej Arbuzov ◽  
Serge Bondarenko ◽  
Lidia Kalinovskaya ◽  
Renat Sadykov ◽  
Vitaly Yermolchyk
Keyword(s):  
Structure Function ◽  
Cross Section ◽  
Higher Order ◽  
Initial State Radiation ◽  
Event Generator ◽  
Radiative Corrections ◽  
Initial State ◽  
Electron Positron ◽  
Electroweak Radiative Corrections ◽  
State Radiation

Electroweak radiative corrections to the cross-section of the process e+e−→ZH are considered. The complete one-loop electroweak radiative corrections are evaluated with the help of the SANC system. Higher-order contributions of the initial-state radiation are computed in the QED structure function formalism. Numerical results are produced by a new version of the ReneSANCe event generator and MCSANCee integrator for the conditions of future electron-positron colliders. The resulting theoretical uncertainty in the description of this process is estimated.

scholarly journals Initial state radiation correction and its effect on data-taking scheme for σB(e+e−→ ZH) measurement

2019 ◽  
Vol 34 (21) ◽  
pp. 1950118
Author(s):  
Shuang Han ◽  
Gang Li ◽  
Xiang Zhou ◽  
Quan-Lin Jie
Keyword(s):  
Cross Section ◽  
Correction Factor ◽  
Line Shape ◽  
Initial State Radiation ◽  
Text Line ◽  
Initial State ◽  
Electron Positron ◽  
Born Cross Section ◽  
State Radiation ◽  
Shape Uncertainty

The measurement of Born cross-section of [Formula: see text] process is one of the major goals of the future Circular Electron Positron Collider, which may reach a precision of 0.5% at 240 GeV. Such unprecedented precision must be guaranteed by both theoretical and experimental sides, such as the calculations of high order corrections, the knowledge of the [Formula: see text] line shape. Uncertainty of the radiative correction factor at 240 GeV caused by the [Formula: see text] line shape is evaluated in this work. Therefore, dedicated data-taking schemes are proposed in order to precisely calculate the ISR correction factor.

scholarly journals Measurement of the e+e−→π+π−π0π0 cross section using initial-state radiation at BABAR

2017 ◽  
Vol 96 (9) ◽  
Author(s):  
J. P. Lees ◽  
V. Poireau ◽  
V. Tisserand ◽  
E. Grauges ◽  
A. Palano ◽  
...  
Keyword(s):  
Cross Section ◽  
Initial State Radiation ◽  
Initial State ◽  
State Radiation

scholarly journals An extension of BDK event generator

2019 ◽  
Vol 212 ◽  
pp. 04010 ◽  
Author(s):  
P. A. Krachkov ◽  
A. I. Milstein ◽  
O. L. Rezanova ◽  
A. G. Shamov
Keyword(s):  
Lepton Pair ◽  
Initial State Radiation ◽  
Event Generator ◽  
Pion Pair ◽  
Initial State ◽  
State Radiation

An extension of the well known ee → 4l event generator of F. A. Berends, P. H. Daverveldt, and R. Kleiss is presented. This extension accounts for production of narrow resonances, as well as the initial state radiation. In addition, it allows one to simulate the production of l+ l−π+π− with the lepton pair and the pion pair in 1−− states.

scholarly journals RECENT RESULTS FROM THE KLOE EXPERIMENT

2005 ◽  
Vol 20 (02n03) ◽  
pp. 493-502
Author(s):  
◽  
GAIA LANFRANCHI
Keyword(s):  
Cross Section ◽  
Neutral Kaon ◽  
Initial State Radiation ◽  
Kaon Decays ◽  
Initial State ◽  
Hadronic Cross Section ◽  
State Radiation

Recent results obtained by the KLOE experiment operating at DAΦNE, the Frascati ϕ-factory, are presented. They mainly concern neutral kaon decays including rare KS decays, KL lifetime, the radiative ϕ→f0γ decay and the measurement of the e+e- hadronic cross section using initial state radiation.

scholarly journals From Hadronic Cross Section to the measurement of the Vacuum Polarization at KLOE: a fascinating endeavour

2018 ◽  
Vol 166 ◽  
pp. 00021 ◽  
Author(s):  
Graziano Venanzoni
Keyword(s):  
Standard Model ◽  
Cross Section ◽  
Vacuum Polarization ◽  
Direct Determination ◽  
Initial State Radiation ◽  
Initial State ◽  
Hadronic Cross Section ◽  
State Radiation ◽  
The Standard Model

The KLOE experiment at the ϕ-factory DAΦNE in Frascati is the first to have employed Initial State Radiation (ISR) to precisely determine the e+e− → π+π−(γ) cross section below 1 GeV. Such a measurement is particularly important to test the Standard Model (SM) calculation for the (g – 2) of the muon, where a long standing 3σ discrepancy is observed. I will review the ISR activity in KLOE in the last 20 years from the measurement of the hadronic cross section to the first direct determination of the time-like complex running α(s) in the region below 1 GeV.

scholarly journals Experimental Review of ΛΛ¯ Production

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 144
Author(s):  
Xiaorong Zhou ◽  
Liang Yan ◽  
Rinaldo Baldini Ferroli ◽  
Guangshun Huang
Keyword(s):  
Positron Annihilation ◽  
Cross Section ◽  
Production Cross ◽  
High Energy ◽  
Threshold Region ◽  
Initial State ◽  
Precision Data ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
State Radiation

Exclusive hyperon-antihyperon production provides a unique insight for understanding of the intrinsic dynamics when strangeness is involved. In this paper, we review the results of ΛΛ¯ production via different reactions from various experiments, e.g., via p¯p annihilation from the LEAR experiment PS185, via electron-positron annihilation using the energy scan method at the CLEO-c and BESIII experiments and the initial-state-radiation approach utilized at the BaBar experiment. The production cross section of ΛΛ¯ near the threshold is sensitive to QCD based prediction. Experimental high precision data for p¯p→Λ¯Λ close to the threshold region is obtained. The cross section of e+e−→ΛΛ¯ is measured from its production threshold to high energy. A non-zero cross section for e+e−→ΛΛ¯ near threshold is observed at BaBar and BESIII, which is in disagreement with the pQCD prediction. However, more precise data is needed to confirm this observation. Future experiments, utilizing p¯p reaction such as PANDA experiment or electron-positron annihilation such as the BESIII and BelleII experiments, are needed to extend the experimental data and to understand the ΛΛ¯ production.

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