Zobrazeno 1 - 10
of 6 041
pro vyhledávání: '"Parton distributions"'
Autor:
R. Boussarie, Y. Mehtar-Tani
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-41 (2024)
Abstract We revisit the high energy semi-classical description of the exclusive processes DVCS, TCS, and Double DVCS by explicitly keeping track of the Feynman x dependence in both the hard and the hadronic matrix elements. This is achieved by a modi
Externí odkaz:
https://doaj.org/article/562e7987c1f443c6b47c61f29f3eacf3
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-21 (2024)
Abstract We present a new prescription to account for heavy quark mass effects in the determination of parton distribution functions (PDFs) based on the FONLL scheme. Our prescription makes explicit use of the freedom to choose the number of active f
Externí odkaz:
https://doaj.org/article/7e2d3b5e61874274bfaae64ab97a36c3
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-27 (2024)
Abstract Distribution amplitudes are functions of non-perturbative matrix elements describing the hadronization of quarks and gluons. Thanks to factorization theorems, they can be used to compute the scattering amplitude of high-energy processes. Rec
Externí odkaz:
https://doaj.org/article/9345146aaacf4f0bab36edae6578ea32
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-17 (2024)
Abstract We present NNPDF4.0MC, a variant of the NNPDF4.0 set of parton distributions (PDFs) at LO, NLO and NNLO, with and without inclusion of the photon PDF, suitable for use with Monte Carlo (MC) event generators, which require PDFs to satisfy add
Externí odkaz:
https://doaj.org/article/5b59121825f44381b1e297661f2b9a97
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-46 (2024)
Abstract Nonrelativistic Quantum Chromodynamics (NRQCD) breaks down in the region of low transverse momentum, where the transverse momentum of the produced quarkonium state is sensitive to multiple scattering with the incoming hadron and to soft gluo
Externí odkaz:
https://doaj.org/article/c0c98aff06764896b90ffcd95924f34f
Autor:
Yoshitaka Hatta, Jakob Schoenleber
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-32 (2024)
Abstract We present a QCD analysis of the twist-three parton distribution functions associated with the spin-orbit correlation of quarks and gluons in spin- 1 2 $$ \frac{1}{2} $$ and spin-0 hadrons. We derive exact non-perturbative identities decompo
Externí odkaz:
https://doaj.org/article/3cf25bfbe7134f31ab8ca5966a2ed28f
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-29 (2024)
Abstract We calculate quantum corrections to the symmetry generators for the transversity operators in quantum chromodynamics (QCD) in the two-loop approximation. Using this result, we obtain the evolution kernel for the corresponding operators at th
Externí odkaz:
https://doaj.org/article/b69dd2cac27a4ff890764666a6f30166
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-32 (2024)
Abstract We present a next-to-leading order perturbative QCD calculation of dimuon production in neutrino-nucleus collisions. This process is typically calculated by assuming it to be proportional to inclusive charm production, which requires an effe
Externí odkaz:
https://doaj.org/article/970640e6e93145db80861b21c3c9a123
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-21 (2024)
Abstract Within the framework of nonrelativistic QCD (NRQCD), we calculate the fragmentation function for a charm quark into an S-wave fully-charmed tetraquark, denoted as T 4c . The charm-to-T 4c fragmentation function is expressed as a sum of produ
Externí odkaz:
https://doaj.org/article/d96f620d21cd4f0a96289f0f9cb5ce44
Autor:
The MAP collaboration, Alessandro Bacchetta, Valerio Bertone, Chiara Bissolotti, Giuseppe Bozzi, Matteo Cerutti, Filippo Delcarro, Marco Radici, Lorenzo Rossi, Andrea Signori
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-45 (2024)
Abstract We present an extraction of the unpolarized transverse-momentum-dependent parton distribution and fragmentation functions that takes into account possible differences between quark flavors and final-state hadrons. The extraction is based on
Externí odkaz:
https://doaj.org/article/f8122fe02c674c8e85d98ce23c562fcc