Results 81 to 90 of about 22,575 (172)

Using the Virasoro conditions to revise the model of a quark-gluon string fragmentation

Journal of High Energy Physics
Quark-gluon string fragmentation is usually seen as a universal process with its physics remaining unchanged for different colliding systems and center-of-mass energy.
R. V. Nikolaenko
doaj   +1 more source

All-gluon amplitudes with off-shell recursion in multiplet bases

Journal of High Energy Physics
The efficient computation of color-summed QCD amplitudes at high parton multiplicities remains a central challenge for precision collider predictions.
Oskar Bolinder, Rikkert Frederix, Malin Sjodahl   +2 more
doaj   +1 more source

The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons

Journal of High Energy Physics
We systematically investigate the electromagnetic form factors of heavy-light pseudo-scalar and vector mesons within the Dyson-Schwinger/Bethe-Salpeter equations framework for the first time.
Yin-Zhen Xu
doaj   +1 more source

The sigma meson from QCD sum rules for large-$N_c$ Regge spectra

, 2016
The QCD sum rules in the large-$N_c$ limit for the light non-strange vector, axial and scalar mesons are considered assuming a string-like linear spectrum for the radially excited states.
Afonin, S. S., Solomko, T. D.
core   +1 more source

Power corrections to the heavy electron form factor

Journal of High Energy Physics
We study the first power correction to the heavy electron form factor in QED and show that it factorizes as a derivative operator. We discuss the result in QED with no light fermions, where the first power correction can be written explicitly in terms of
Aniruddha Venkata
doaj   +1 more source

Mechanical properties of proton using flavor-decomposed gravitational form factors

Journal of High Energy Physics
We investigate the mechanical properties of the proton by extracting its flavor-decomposed gravitational form factors (GFFs) using Light-Cone QCD sum rules (LCSR).
Zeinab Dehghan, F. Almaksusi, K. Azizi
doaj   +1 more source

Possible Light U(1) Gauge Boson Coupled to Baryon Number

, 1994
We discuss the phenomenology of a light U(1) gauge boson, $\gamma_B$, that couples only to baryon number. We assume that the new U(1) gauge symmetry is spontaneously broken and that the $\gamma_B$ mass is smaller than $m_Z$.
Carone, Christopher D., Murayama, Hitoshi   +1 more
core   +1 more source

Hadrons and Nuclei

, 2019
This document is one of a series of whitepapers from the USQCD collaboration. Here, we discuss opportunities for lattice QCD calculations related to the structure and spectroscopy of hadrons and nuclei.
Detmold, William, Dudek, Jozef J., Edwards, Robert G., Engelhardt, Michael, Lin, Huey-Wen, Meinel, Stefan, Orginos, Kostas, Shanahan, Phiala   +7 more
core   +1 more source

Parton Distributions in the Higgs Boson Era

, 2013
Parton distributions are an essential ingredient of the LHC program. PDFs are relevant for precision Standard Model measurements, for Higgs boson characterization as well as for New Physics searches.
Rojo, Juan
core   +1 more source

Revising the mass of light hybrid mesons: NLO QCD sum rules point to ϕ(2170) as a prime candidate

Journal of High Energy Physics
We present a comprehensive next-to-leading order (NLO) QCD sum rule analysis for light hybrid mesons with J PC = 1 −− , incorporating condensates up to dimension-8 and NLO corrections to the perturbative, gluon condensate, and four-quark condensate ...
Shuang-Hong Li, Zhuo-Ran Huang, Wei Chen, Hong-Ying Jin   +3 more
doaj   +1 more source