scholarly journals Comparison of ​horace and ​photos Algorithms for Multiphoton Emission in the Context ofWBoson Mass Measurement

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Ashutosh V. Kotwal ◽  
Bodhitha Jayatilaka
Keyword(s):  
Transverse Momentum ◽  
Virtual Photon ◽  
Mass Measurement ◽  
Photon Emission ◽  
Momentum Spectrum ◽  
Boson Mass ◽  
Real Photon ◽  
Transverse Momentum Spectrum ◽  
Final State ◽  
Measured Mass

Wboson mass measurement is sensitive to QED radiative corrections due to virtual photon loops and real photon emission. The largest shift in the measured mass, which depends on the transverse momentum spectrum of the charged lepton from the boson decay, is caused by the emission of real photons from the final-state lepton. There are a number of calculations and codes available to model the final-state photon emission. We perform a detailed study, comparing the results fromhoraceandphotosimplementations of the final-state multiphoton emission in the context of a direct measurement ofWboson mass at Tevatron. Mass fits are performed using a simulation of the CDF II detector.

scholarly journals Effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of ϕ meson

2020 ◽  
Vol 29 (07) ◽  
pp. 2050047
Author(s):  
Yong Zhang ◽  
Jing Yang ◽  
Weihua Wu
Keyword(s):  
Transverse Momentum ◽  
Collision Energy ◽  
Elliptic Flow ◽  
Momentum Spectrum ◽  
Mass Shift ◽  
Large Momentum ◽  
Transverse Momentum Spectrum ◽  
Medium Mass ◽  
Different Sources ◽  
Momentum Region

We study the effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of [Formula: see text] meson. It is found that the mass-shift enhances the [Formula: see text] yields and suppresses the elliptic flow [Formula: see text] in large momentum region, and the effects increase with the increasing mass-shift. The effects are various for different sources and decrease with the increasing collision energy. We further study the effects for parts of all [Formula: see text] meson with mass-shift, and the effects decrease with the decreasing probability of [Formula: see text] meson with mass-shift. A possible method to detect the mass-shift of [Formula: see text] meson via transverse-momentum spectrum and [Formula: see text] is proposed.

scholarly journals The Zγ transverse-momentum spectrum at NNLO+N3LL

2020 ◽  
Vol 809 ◽  
pp. 135718 ◽  
Author(s):  
Marius Wiesemann ◽  
Luca Rottoli ◽  
Paolo Torrielli
Keyword(s):  
Transverse Momentum ◽  
Momentum Spectrum ◽  
Transverse Momentum Spectrum

MEASUREMENT OF THE ANGULAR DISTRIBUTION OF ELECTRONS FROM W→eν DECAYS OBSERVED IN $p\bar p$ COLLISIONS AT $\sqrt{s} =1.8\, {\rm TeV}$

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 318-321
Author(s):  
◽  
GEORG STEINBRÜCK
Keyword(s):  
Angular Distribution ◽  
Transverse Momentum ◽  
Perturbative Qcd ◽  
W Boson ◽  
Mass Measurement ◽  
Polar Angle ◽  
Distribution Parameter ◽  
Boson Mass ◽  
Leading Order ◽  
Proton Antiproton

We present the first measurement of the electron angular distribution parameter α2 in W → e ν events in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DØ detector during the 1994–1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distribution of (1 ± α1 cos θ* + α2 cos 2 θ*), where θ* is the polar angle of the electron in the Collins-Soper frame and α1 and α2 are functions of [Formula: see text], the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non-negligible contrbution to the W boson mass measurement.

scholarly journals Precise QCD description of the Higgs boson transverse momentum spectrum

2019 ◽  
Vol 788 ◽  
pp. 425-430 ◽  
Author(s):  
Xuan Chen ◽  
Thomas Gehrmann ◽  
E.W. Nigel Glover ◽  
Alexander Huss ◽  
Ye Li ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Transverse Momentum ◽  
Momentum Spectrum ◽  
Transverse Momentum Spectrum
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