scholarly journals Threshold resummation of transverse momentum distributions beyond next-to-leading log

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Stefano Forte ◽  
Giovanni Ridolfi ◽  
Simone Rota
Keyword(s):  
Renormalization Group ◽  
Transverse Momentum ◽  
General Expression ◽  
Momentum Distribution ◽  
Gluon Fusion ◽  
Transverse Momentum Distribution ◽  
Leading Order ◽  
Final State ◽  
Threshold Resummation ◽  
Momentum Distributions

Abstract We derive a general expression for the threshold resummation of transverse momentum distributions for processes with a colorless final state, by suitably generalizing the renormalization-group based approach to threshold resummation previously pursued by two of us. The ensuing expression holds to all logarithmic orders, and it can be used to extend available results in the literature, which only hold up to the next-to-leading log (NLL) level. We check agreement of our result with the existing NLL result, as well as against the known fixed next-to-leading order results for the Higgs transverse momentum distribution in gluon fusion, and we provide explicit expressions at the next-to-next-to-leading log level.

scholarly journals Investigation of Particle Distributions in Xe-Xe Collision at sNN=5.44 TeV with the Tsallis Statistics

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Hai-Fu Zhao ◽  
Bao-Chun Li ◽  
Hong-Wei Dong
Keyword(s):  
Transverse Momentum ◽  
Momentum Distribution ◽  
Charged Particles ◽  
High Energy ◽  
Transverse Momentum Distribution ◽  
Final State ◽  
Tsallis Statistics ◽  
Nuclear Modification Factor ◽  
Particle Distributions ◽  
Modification Factor

The distribution characteristic of final-state particles is one of the significant parts in high-energy nuclear collisions. The transverse momentum distribution of charged particles carries essential evolution information about the collision system. The Tsallis statistics is used to investigate the transverse momentum distribution of charged particles produced in Xe-Xe collisions at sNN=5.44 TeV. On this basis, we reproduce the nuclear modification factor of the charged particles. The calculated results agree approximately with the experimental data measured by the ALICE Collaboration.

PARTICLE DISTRIBUTION AND NUCLEAR STOPPING IN Au+Au COLLISIONS AT $\sqrt{s_{NN}}=200~{\rm GeV}$

2007 ◽  
Vol 22 (15) ◽  
pp. 1105-1112
Author(s):  
L. L. ZHU ◽  
C. B. YANG
Keyword(s):  
Transverse Momentum ◽  
Momentum Distribution ◽  
Particle Distribution ◽  
Charged Particles ◽  
Transverse Momentum Distribution ◽  
Nuclear Stopping ◽  
Central Collisions ◽  
Gold Collisions ◽  
Momentum Distributions ◽  
Rapidity Distributions

The transverse momentum distribution of charged particles is investigated for gold–gold collisions at [Formula: see text]. A simple parametrization is suggested for the particle distribution based on the nuclear stopping effect. The model can fit very well in both the transverse momentum distributions at different pseudo-rapidities and the pseudo-rapidity distributions at different centralities. The ratio of rapidity distributions for peripheral and central collisions is calculated and compared with the data.

scholarly journals LARGE-QTW-BOSON PRODUCTION AT THE TEVATRON

2005 ◽  
Vol 20 (15) ◽  
pp. 3233-3235
Author(s):  
NIKOLAOS KIDONAKIS ◽  
AGUSTíN SABIO VERA
Keyword(s):  
Transverse Momentum ◽  
Momentum Distribution ◽  
W Bosons ◽  
Scale Dependence ◽  
Transverse Momentum Distribution ◽  
Soft Gluon ◽  
Boson Production ◽  
Leading Order ◽  
Large Transverse Momentum

The production of W bosons at large transverse momentum at the Tevatron is dominated by soft-gluon corrections. In this talk we present a calculation of these corrections at next-to-next-to-leading order. The corrections enhance the transverse momentum distribution of the W while reducing the scale dependence.

scholarly journals Next-to-Next-to-Leading-Order QCD Corrections to the Transverse Momentum Distribution of Weak Gauge Bosons

2018 ◽  
Vol 120 (12) ◽  
Author(s):  
A. Gehrmann-De Ridder ◽  
T. Gehrmann ◽  
E. W. N. Glover ◽  
A. Huss ◽  
D. M. Walker
Keyword(s):  
Transverse Momentum ◽  
Momentum Distribution ◽  
Transverse Momentum Distribution ◽  
Leading Order ◽  
Gauge Bosons

scholarly journals Infrared renormalons in kinematic distributions for hadron collider processes

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Silvia Ferrario Ravasio ◽  
Giovanni Limatola ◽  
Paolo Nason
Keyword(s):  
Transverse Momentum ◽  
Momentum Distribution ◽  
Vector Boson ◽  
Hadron Collider ◽  
High Energy ◽  
Transverse Momentum Distribution ◽  
Final State ◽  
Very High Energy ◽  
Neutral Vector ◽  
Perturbative Corrections

Abstract Infrared renormalons in Quantum Chromodynamics are associated with non-perturbative corrections to short distance observables. Linear renormalons, i.e. such that the associated non-perturbative corrections scale like one inverse power of the hard scale, can affect at a non-negligible level even the very high-energy phenomena studied at the Large Hadron Collider. Using an Abelian model, we study the presence of linear renormalons in the transverse momentum distribution of a neutral vector boson Z produced in hadronic collisions. We consider a process where the Z transverse momentum is balanced by a sizable recoil against a coloured final state particle. One may worry that such a colour configuration, not being azimuthally symmetric, could generate unbalanced soft radiation, associated in turn with linear infrared renormalons affecting the transverse momentum distribution of the vector boson. We performed a numerical calculation of the renormalon effects for this process in the so-called large b0 limit. We found no evidence of linear renormalons in the transverse momentum distribution of the Z in the large transverse-momentum region, irrespective of rapidity cuts.

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