scholarly journals Nucleon binding energy and transverse momentum imbalance in neutrino-nucleus reactions

2020 ◽  
Vol 101 (9) ◽  
Author(s):  
T. Cai ◽  
X.-G. Lu ◽  
L. A. Harewood ◽  
C. Wret ◽  
F. Akbar ◽  
...  
Keyword(s):  
Binding Energy ◽  
Transverse Momentum ◽  
Momentum Imbalance

Mass and energy dependence of the transverse momentum densities in covariant parton model

2015 ◽  
Vol 30 (27) ◽  
pp. 1550133 ◽  
Author(s):  
M. M. Yazdanpanah ◽  
A. Mirjalili ◽  
A. Behjat Ramezani
Keyword(s):  
Binding Energy ◽  
Transverse Momentum ◽  
Quark Model ◽  
Energy Dependence ◽  
Parton Model ◽  
Longitudinal Momentum ◽  
Transverse Momentum Dependent ◽  
Unpolarized Case ◽  
Covariant Quark Model ◽  
Good Agreement

The parton densities which are dependent on transverse momentum, open a way to understand better the structure of quarks and gluons in a more complete way. We are investigating a method based on the covariant quark model which enables us to extract the transverse momentum dependent (TMD) densities from the usual parton densities which are just dependent on the longitudinal momentum. In continuation, we obtain the dependence of the TMDs on binding energy and the mass of quarks. We do some calculations to obtain the TMDs in the unpolarized case while the mass and binding energy of partons are varying. Considering these effects, the results for TMDs are in good agreement with the results of the recent related models.

scholarly journals TMD factorization for dijet and heavy-meson pair in DIS

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Rafael F. del Castillo ◽  
Miguel G. Echevarria ◽  
Yiannis Makris ◽  
Ignazio Scimemi
Keyword(s):  
Transverse Momentum ◽  
Heavy Quark ◽  
Anomalous Dimension ◽  
Heavy Meson ◽  
Effective Field ◽  
Transverse Momentum Dependent ◽  
Soft Function ◽  
Linearly Polarized ◽  
Momentum Imbalance ◽  
Meson Pair

Abstract We study a transverse momentum dependent (TMD) factorization framework for the processes of dijet and heavy-meson pair production in deep-inelastic-scattering in an electron-proton collider, considering the measurement of the transverse momentum imbalance of the two hard probes in the Breit frame. For the factorization theorem we employ soft-collinear and boosted-heavy-quark effective field theories. The factorized cross-section for both processes is sensitive to gluon unpolarized and linearly polarized TMD distributions and requires the introduction of a new soft function. We calculate the new soft function here at one-loop, regulating rapidity divergences with the δ-regulator. In addition, using a factorization consistency relation and a universality argument regarding the heavy-quark jet function, we obtain the anomalous dimension of the new soft function at two and three loops.

scholarly journals Study of Z boson plus jets events using variables sensitive to double-parton scattering in pp collisions at 13 TeV

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
◽  
A. Tumasyan ◽  
W. Adam ◽  
J. W. Andrejkovic ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Cross Sections ◽  
Z Boson ◽  
Proton Collision ◽  
Proton Proton ◽  
Double Parton Scattering ◽  
Important Input ◽  
Momentum Imbalance ◽  
Simulation Parameters ◽  
Parton Scattering

Abstract Double-parton scattering is investigated using events with a Z boson and jets. The Z boson is reconstructed using only the dimuon channel. The measurements are performed with proton-proton collision data recorded by the CMS experiment at the LHC at $$ \sqrt{s} $$ s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1 collected in the year 2016. Differential cross sections of Z+ ≥1 jet and Z+ ≥2 jets are measured with transverse momentum of the jets above 20 GeV and pseudorapidity |η| < 2.4. Several distributions with sensitivity to double-parton scattering effects are measured as functions of the angle and the transverse momentum imbalance between the Z boson and the jets. The measured distributions are compared with predictions from several event generators with different hadronization models and different parameter settings for multiparton interactions. The measured distributions show a dependence on the hadronization and multiparton interaction simulation parameters, and are important input for future improvements of the simulations.

HIGH TRANSVERSE MOMENTUM PROCESSES

1973 ◽  
Vol 34 (C1) ◽  
pp. C1-385-C1-399 ◽  
Author(s):  
J. D. BJORKEN
Keyword(s):  
Transverse Momentum ◽  
High Transverse Momentum
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