Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Bernd A. Kniehl"'
Angular analysis of bottom-flavored hadron production in semileptonic decays of polarized top quarks
Publikováno v:
Physical Review
We study the inclusive production of bottom-flavored hadrons from semileptonic decays of polarized top quarks at next-to-leading order in QCD using fragmentation functions recently determined from a global fit to $e^+e^-$ data. We provide the relevan
Autor:
Maxim Nefedov, Vladimir Saleev, Marco Radici, A. Guskov, Jean-Philippe Lansberg, Alessandro Bacchetta, Miguel G. Echevarria, A. Rymbekova, K. F. Liu, Andrej Arbuzov, Oleg Teryaev, A. Karpishkov, Bernd A. Kniehl, Umberto D'Alesio, B. Parsamyan, Francesco Murgia, S. Kumano, M. Deka, N.Ya. Ivanov, A.V. Efremov, Francesco Giovanni Celiberto, Cristian Pisano, M. Butenschoen, A. Shipilova, Ya. Klopot, Qin-Tao Song, I. Denisenko, Aram Kotzinian
Publikováno v:
Prog.Part.Nucl.Phys.
Prog.Part.Nucl.Phys., 2021, 119, pp.103858. ⟨10.1016/j.ppnp.2021.103858⟩
Prog.Part.Nucl.Phys., 2021, 119, pp.103858. ⟨10.1016/j.ppnp.2021.103858⟩
The Spin Physics Detector (SPD) is a future multipurpose experiment foreseen to run at the NICA collider, which is currently under construction at the Joint Institute for Nuclear Research (JINR, Dubna, Russia). The physics program of the experiment i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2af9fb10f106bab8d4bcc2dbb3999bf8
https://hal.archives-ouvertes.fr/hal-03086776
https://hal.archives-ouvertes.fr/hal-03086776
Publikováno v:
Physical Review D. 101
We study $J/\ensuremath{\psi}$ and ${\ensuremath{\eta}}_{c}$ inclusive production in $\mathrm{\ensuremath{\Upsilon}}$ decay within the framework of nonrelativistic-QCD (NRQCD) factorization. In the latter case, for which no experimental data exist so
Autor:
Mathias Butenschoen, Bernd A. Kniehl
Publikováno v:
Nuclear physics / B Particle physics 957, 115056-(2020). doi:10.1016/j.nuclphysb.2020.115056
Nuclear Physics
Nuclear Physics B, Vol 957, Iss, Pp 115056-(2020)
Nuclear Physics
Nuclear Physics B, Vol 957, Iss, Pp 115056-(2020)
Nuclear physics / B Particle physics 957, 115056 - (2020). doi:10.1016/j.nuclphysb.2020.115056
We compare two approaches to evaluate cross sections of heavy-quarkonium production at next-to-leading order in nonrelativistic QCD involving S - and
We compare two approaches to evaluate cross sections of heavy-quarkonium production at next-to-leading order in nonrelativistic QCD involving S - and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9abbcd61101c6ca6be061a60b3484348
Autor:
Bernd A. Kniehl, Oleg L. Veretin
Publikováno v:
Physics letters / B B 804, 135398-(2020). doi:10.1016/j.physletb.2020.135398
Physics Letters
Physics Letters B, Vol 804, Iss, Pp-(2020)
Physics Letters
Physics Letters B, Vol 804, Iss, Pp-(2020)
We consider the renormalization of the matrix elements of the bilinear quark operators $\bar{\psi}\psi$, $\bar{\psi}\gamma_\mu\psi$, and $\bar{\psi}\sigma_{\mu\nu}\psi$ at next-to-next-to-next-to-leading order in QCD perturbation theory at the symmet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57ddfbaee4296e8143b68c1464c52ac1
https://bib-pubdb1.desy.de/record/438283
https://bib-pubdb1.desy.de/record/438283
Autor:
Oleg L. Veretin, Bernd A. Kniehl
Publikováno v:
Nuclear physics / B 961, 115229 (1-11) (2020). doi:10.1016/j.nuclphysb.2020.115229
Nuclear Physics
Nuclear Physics
Nuclear physics / B 961, 115229 (1-11) (2020). doi:10.1016/j.nuclphysb.2020.115229
We study the renormalization of the matrix elements of the twist-two non-singlet bilinear quark operators, contributing to the n=2 and n=3 moments of the structur
We study the renormalization of the matrix elements of the twist-two non-singlet bilinear quark operators, contributing to the n=2 and n=3 moments of the structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d72d598f4134026d22c44dbfa1da9f7
Autor:
Mathias Butenschoen, Bernd A. Kniehl
Publikováno v:
Nuclear Physics
Nuclear physics / B 950, 114843-(2020). doi:10.1016/j.nuclphysb.2019.114843
Nuclear Physics B, Vol 950, Iss, Pp-(2020)
Nuclear physics / B 950, 114843-(2020). doi:10.1016/j.nuclphysb.2019.114843
Nuclear Physics B, Vol 950, Iss, Pp-(2020)
We describe an implementation of a subtraction scheme in the nonrelativistic-QCD treatment of heavy-quarkonium production at next-to-leading-order in the strong-coupling constant, covering $S$- and $P$-wave bound states. It is based on the dipole sub
Autor:
Anatoly V. Kotikov, Bernd A. Kniehl
Publikováno v:
Physics of Particles and Nuclei. 49:921-923
We show the new relationship [1] between the anomalous dimensions, resummed through next-to-next-to-leading-logarithmic order, in the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations for the first Mellin moments D{q,g}(\mu2) of
Publikováno v:
Nuclear Physics B, Vol 916, Iss C, Pp 463-483 (2017)
Nuclear physics / B 916, 463-483 (2017). doi:10.1016/j.nuclphysb.2017.01.004
Nuclear Physics B
Nuclear physics / B 916, 463-483 (2017). doi:10.1016/j.nuclphysb.2017.01.004
Nuclear Physics B
Nuclear physics / B 916, 463 - 483(2017). doi:10.1016/j.nuclphysb.2017.01.004
We consider electroweak corrections to the relation between the running $\overline{MS}$ mass m$_b$ of the b quark in the five-flavor QCD×QED effective theory and its
We consider electroweak corrections to the relation between the running $\overline{MS}$ mass m$_b$ of the b quark in the five-flavor QCD×QED effective theory and its
Publikováno v:
Physical Review Letters. 123
Based on the hypothesis that the $X(3872)$ exotic hadron is a mixture of ${\ensuremath{\chi}}_{c1}(2P)$ and other states and that its prompt hadroproduction predominately proceeds via its ${\ensuremath{\chi}}_{c1}(2P)$ component, we calculate the $\m