scholarly journals Transverse Momentum Resummation for Z boson Plus Jet Production at the LHC

2020 ◽  
Vol 235 ◽  
pp. 02003
Author(s):  
Peng Sun ◽  
Bin Yan ◽  
C.-P. Yan ◽  
Feng Yuan
Keyword(s):  
Transverse Momentum ◽  
Z Boson ◽  
Numerical Results ◽  
Transverse Momentum Dependent ◽  
Jet Production ◽  
Associated Production ◽  
Factorization Formalism ◽  
Leading Logarithm

We study the transverse momentum resummation effects for the Z boson plus jet associated production at the LHC within the transverse momentum dependent (TMD) factorization formalism. The large logarithm ln (Q2/q⊥2) with Q ≫ q⊥ has been resumed to Next-to-Leading Logarithm (NLL) accuracy. We compare our numerical results to the CMS data by reweighting method. It shows that our prediction agree with the data very well.

scholarly journals Transverse Momentum Dependent Gluon Distributions at the LHC

2015 ◽  
Vol 37 ◽  
pp. 1560031
Author(s):  
Cristian Pisano
Keyword(s):  
Transverse Momentum ◽  
Energy Scale ◽  
Transverse Momentum Dependent ◽  
Scalar Particles ◽  
Associated Production ◽  
Linearly Polarized ◽  
Gluon Distributions ◽  
Azimuthal Asymmetries ◽  
Pseudo Scalar ◽  
Hadronic Collisions

Linearly polarized gluons inside an unpolarized proton contribute to the transverse momentum distributions of (pseudo)scalar particles produced in hadronic collisions, such as Higgs bosons and quarkonia with even charge conjugation (ηc, ηb, χc0, χb0). Moreover, they can produce azimuthal asymmetries in the associated production of a photon and a J/ψ or a Υ particle, in a kinematic configuration in which they are almost back to back. These observables, which can be measured in the running experiments at the LHC, could lead to a first extraction of both the polarized and the unpolarized gluon distributions and allow for a study of their process and energy scale dependences.

scholarly journals Phenomenology of TMDs Using SCET

2015 ◽  
Vol 37 ◽  
pp. 1560026
Author(s):  
Stefano Melis ◽  
Umberto D'Alesio ◽  
Miguel G. Echevarria ◽  
Ignazio Scimemi
Keyword(s):  
Transverse Momentum ◽  
Z Boson ◽  
Nucleon Structure ◽  
Boson Production ◽  
Transverse Momentum Dependent ◽  
Evolution Kernel ◽  
Global Fit ◽  
Logarithmic Accuracy ◽  
Perturbative Corrections

We present a global fit of current available data for Drell-Yan and Z-boson production using the Transverse Momentum Dependent evolution formalism of Refs. [1–4]. We performed our analysis including perturbative calculable contributions up to next-to-next-to-leading-logarithmic accuracy. We took into account non-perturbative corrections both to the intrinsic nucleon structure and to the evolution kernel.

scholarly journals Azimuthal Asymmetries of the Drell-Yan Process in pA Collisions

2016 ◽  
Vol 40 ◽  
pp. 1660059
Author(s):  
Jian-Hua Gao
Keyword(s):  
Transverse Momentum ◽  
Quark Distribution ◽  
Lepton Pair ◽  
Parton Distributions ◽  
Transverse Momentum Dependent ◽  
Gauge Link ◽  
Factorization Formalism ◽  
Azimuthal Asymmetries ◽  
Nuclear Effects

We discuss the azimuthal asymmetries of the Drell-Yan process in nucleon-nucleus collisions at the low transverse momentum of the lepton pair. Within the transverse-momentum-dependent (TMD) factorization formalism, the nuclear effects of these azimuthal asymmetries can be from the gauge link of the TMD quark distribution. We estimate all these nuclear effects within the assumption that all the TMD parton distributions or correlations are in Gaussian forms.

ResBos and ePump Analysis on ATLAS 8TeV Z Boson Transverse Momentum Distributions

2021 ◽  
Author(s):  
Qaynar Jandaolet ◽  
Alim Ablat ◽  
Pazilet Obul ◽  
Reyima Rashidin ◽  
Ibrahim Sitiwaldi
Keyword(s):  
Transverse Momentum ◽  
Z Boson ◽  
Momentum Distributions

scholarly journals Factorization of e+e− → H X cross section, differential in zh, PT and thrust, in the 2-jet limit

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
M. Boglione ◽  
A. Simonelli
Keyword(s):  
Transverse Momentum ◽  
Cross Section ◽  
Belle Collaboration ◽  
Hadron Production ◽  
Leading Order ◽  
Transverse Momentum Dependent ◽  
Factorization Scheme ◽  
Phenomenological Studies ◽  
Cross Section Differential ◽  
Perturbative Part

Abstract Factorizing the cross section for single hadron production in e+e− annihilations is a highly non trivial task when the transverse momentum of the outgoing hadron with respect to the thrust axis is taken into account. We work in a scheme that allows to factorize the e+e−→ H X cross section as a convolution of a calculable hard coefficient and a Transverse Momentum Dependent (TMD) fragmentation function. The result, differential in zh, PT and thrust, will be given to all orders in perturbation theory and explicitly computed to Next to Leading Order (NLO) and Next to Leading Log (NLL) accuracy. The predictions obtained from our computation, applying the simplest and most natural ansatz to model the non-perturbative part of the TMD, are in exceptional agreement with the experimental measurements of the BELLE Collaboration. The factorization scheme we propose relates the TMD parton densities defined in 1-hadron and 2-hadron processes, restoring the possi- bility to perform global phenomenological studies of TMD physics including experimental data from semi-inclusive deep inelastic scattering, Drell-Yan processes, e+e−→ H1H2X and e+e−→ H X annihilations.

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