Results 71 to 80 of about 73,038 (193)

Intrinsic bottom and its impact on heavy new physics at the LHC

EPJ Web of Conferences, 2016
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do not ...
Lyonnet Florian
doaj   +1 more source

Dynamical NNLO parton distributions

, 2009
Utilizing recent DIS measurements (\sigma_r, F_{2,3,L}) and data on hadronic dilepton production we determine at NNLO (3-loop) of QCD the dynamical parton distributions of the nucleon generated radiatively from valencelike positive input distributions at
E. Reya, E. M. Lobodzinska, I. Bierenbaum, J. Blümlein, M. Buza, P. Jimenez-Delgado   +5 more
core   +1 more source

Pion Parton Distributions in a non local Lagrangian [PDF]

, 2006
We use phenomenological nonlocal Lagrangians, which lead to non trivial forms for the quark propagator, to describe the pion. We define a procedure, based on the Dyson-Schwinger equations, for the calculation of the pion parton distributions at low Q^2 ...
Alberg, Altarelli, Altarelli, Anikin, Arriola, Arriola, Aurenche, Badier), Ball, Bender, Best, Betev), Bissey, Bowman, Bowman, Burden, Conway, Curtis, Davidson, Detmold, Diehl, Dyakonov, Hawes, Hecht, Ji, Munczek, Müller, Nambu, Noguera, Noguera, Polyakov, Polyakov, Radyushkin, Roberts, S. Noguera, Scopetta, Scopetta, Sutton, Tiburzi, Traini, V. Vento   +40 more
core   +2 more sources

Double parton distributions in the pion in the Nambu–Jona-Lasinio model

Journal of High Energy Physics, 2019
Two-parton correlations in the pion, a non perturbative information encoded in double parton distribution functions, are investigated in the Nambu–Jona-Lasinio model.
Aurore Courtoy, Santiago Noguera, Sergio Scopetta   +2 more
doaj   +1 more source

Factorization and transverse phase-space parton distributions

Journal of High Energy Physics, 2021
We first revisit impact-parameter dependent collisions of ultra-relativistic particles in quantum field theory. Two conditions sufficient for defining an impact-parameter dependent cross section are given, which could be violated in proton-proton ...
Bin Wu
doaj   +1 more source

A model for parton distributions in hadrons [PDF]

, 1999
The non-perturbative parton distributions in hadrons are derived from simple physical arguments resulting in an analytical expression for the valence parton distributions. The sea partons arise mainly from pions in hadronic fluctuations.
A. Edin, Arneodo, Derrick, Edin, G. Ingelman, Glück, Lai, Martin, Peng   +8 more
core   +3 more sources

Hadron structure beyond collinear level and precision DIS measurements

EPJ Web of Conferences, 2015
General formulations of QCD factorization for hadronic collisions extend the notion of ordinary parton distributions to transverse-momentum dependent (TMD) parton density and parton decay functions.
Hautmann F, Jung H
doaj   +1 more source

Parton Distributions in the Virtual Photon Target and Factorization Scheme Dependence [PDF]

, 2000
We investigate parton distributions in the virtual photon target, both polarized and unpolarized, up to the next-leading order (NLO) in QCD. Parton distributions can be predicted completely up to NLO, but they are factorization-scheme-dependent.
Ball, Bodwin, Cheng, Cheng, Furmanski, Glück, Ken Sasaki, Kodaira, Kodaira, Mertig, Müller, Sasaki, Sasaki, Sasaki, Tsuneo Uematsu, Uematsu, Vogelsang, Vogelsang   +17 more
core   +3 more sources

NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions

Journal of High Energy Physics, 2023
We revisit the next-to-leading order (NLO) perturbative QCD corrections for the deeply virtual meson production (DVMP) process, exploring its phenomenology both in isolation and in a multichannel fit combined with deeply virtual Compton scattering (DVCS).
Marija Čuić, Goran Duplančić, Krešimir Kumerički, Kornelija Passek-K   +3 more
doaj   +1 more source

Parton Distributions Working Group [PDF]

, 2000
The main focus of this working group was to investigate the different issues associated with the development of quantitative tools to estimate parton distribution functions uncertainties.
Berger, E. L., Brock, R., Casey, D., de Barbaro, L., Demina, R., Giele, W. T., Hirosky, R., Huston, J., Kalk, J., Keller, S. A., Klasen, M., Kosower, D. A., Kramer, M., Kretzer, S., Kuhlmann, S., Martin, R., Olness, F. I., Plehn, T., Pumplin, J., Scalise, R. J., Schellman, H., Smith, J., Soper, D. E., Sterman, G., Stump, D., Tung, W. -K., Varelas, N., Vogelsang, W., Yang, U. K.   +28 more
core   +1 more source