Semileptonic decays of $$B_c$$Bc meson to S-wave charmonium states in the perturbative QCD approach [PDF]
, 2016 Inspired by the recent measurement of the ratio of $$B_c$$Bc branching fractions to $$J/\psi \pi ^+$$J/ψπ+ and $$J/\psi \mu ^+\nu _{\mu }$$J/ψμ+νμ final states at the LHCb detector, we study the semileptonic decays of $$B_c$$Bc meson to the S-wave ground
Zhou Rui +3 more
semanticscholar +1 more source
Precise QCD description of the Higgs boson transverse momentum spectrum
Physics Letters B, 2019 The transverse momentum (pT) distribution of Higgs bosons at hadron colliders enables a detailed probe of its production dynamics and is a key ingredient to precision studies of Higgs boson properties, but receives very large QCD corrections. We obtain a
Xuan Chen +8 more
doaj +1 more source
Foundations of Perturbative QCD
, 2011 1. Introduction 2. Why QCD? 3. Basics of QCD 4. Infra-red safety and non-safety 5. Libby-Sterman analysis and power counting 6. Parton model to parton theory I 7. Parton model to parton theory II 8. Factorization 9. Corrections to the parton model in QCD
J. Collins
semanticscholar +1 more source
Shear Viscosity of Quark-Gluon Plasma in Weak Magnetic Field in Perturbative QCD: Leading Log [PDF]
, 2017 We compute the shear viscosity of two-flavor QCD plasma in an external magnetic field in perturbative QCD at leading log order, assuming that the magnetic field is weak or soft: $eB\sim g^4\log(1/g)T^2$.
Shiyong Li, Ho-Ung Yee
semanticscholar +1 more source
Vacuum correlators at short distances from lattice QCD
Journal of High Energy Physics, 2021 Non-perturbatively computing the hadronic vacuum polarization at large photon virtualities and making contact with perturbation theory enables a precision determination of the electromagnetic coupling at the Z pole, which enters global electroweak fits ...
Marco Cè +4 more
doaj +1 more source
Longitudinal Conductivity in Strong Magnetic Field in Perturbative QCD: Complete Leading Order [PDF]
, 2016 We compute the longitudinal electrical conductivity in the presence of a strong background magnetic field in complete leading order of perturbative QCD, based on the assumed hierarchy of scales αseB≪(mq2,T2)≪eB.
K. Hattori +3 more
semanticscholar +1 more source
Quark mass relations to four-loop order in perturbative QCD. [PDF]
Physical Review Letters, 2015 We present results for the relation between a heavy quark mass defined in the on-shell and minimal subtraction (MS[over ¯]) scheme to four-loop order. The method to compute the four-loop on-shell integral is briefly described and the new results are used
P. Marquard +3 more
semanticscholar +1 more source
Quantum simulation of colour in perturbative quantum chromodynamics
SciPost Physics, 2023 Quantum computers are expected to give major speed-ups for the simulation of quantum systems. In this work, we present quantum gates that simulate the colour part of the interactions of quarks and gluons in perturbative quantum chromodynamics (QCD). As a
Herschel A. Chawdhry, Mathieu Pellen
doaj +1 more source
Nonperturbative QCD, gauge-fixing, Gribov copies, and the lattice [PDF]
, 2003 Perturbative QCD uses the Faddeev-Popov gauge-fixing procedure, which leads to ghosts and the local BRST invariance of the gauge-fixed perturbative QCD action.
Williams, Anthony G.
core +2 more sources
Event-by-event fluctuations in perturbative QCD + saturation + hydro model: pinning down QCD matter shear viscosity in ultrarelativistic heavy-ion collisions [PDF]
, 2015 We introduce an event-by-event perturbative-QCD + saturation + hydro ("EKRT") framework for ultrarelativistic heavy-ion collisions, where we compute the produced fluctuating QCD-matter energy densities from next-to-leading order perturbative QCD using a ...
H. Niemi, K. Eskola, R. Paatelainen
semanticscholar +1 more source