Results 151 to 160 of about 11,120,519 (277)

Scalar-fermion analytic bootstrap in 4D

Journal of High Energy Physics, 2019
In this work we discuss an analytic bootstrap approach [1, 2] in the context of spinning 4D conformal blocks [3, 4]. As an example we study the simplest spinning case, the scalar-fermion correlator ϕ ψ ϕ ψ ¯ $$ \left\langle \phi\ \psi\ \phi\ \overline ...
Emtinan Elkhidir, Denis Karateev
doaj   +1 more source

Quantum fermion superradiance and vacuum ambiguities on charged black holes

Journal of High Energy Physics
Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present.
Álvaro Álvarez-Domínguez, Elizabeth Winstanley   +1 more
doaj   +1 more source

New nonperturbative scales and glueballs in confining supersymmetric gauge theories

Journal of High Energy Physics, 2018
We show that new nonperturbative scales exist in four-dimensional N $$ \mathcal{N} $$ = 1 super-Yang-Mills theory compactified on a circle, with an iterated-exponential dependence on the inverse gauge coupling.
Mohamed M. Anber, Erich Poppitz
doaj   +1 more source

Nonperturbative O(m−2) effects in B→Xγ from heavy quark effective theory [PDF]

, 1998
Junegone Chay
openalex   +1 more source

Squeezing, chaos and thermalization in periodically driven quantum systems: the case of bosonic preheating

Journal of High Energy Physics
The phenomena of Squeezing and chaos have recently been studied in the context of inflation. We apply this formalism in the post-inflationary preheating phase.
Ayan Chakraborty, Debaprasad Maity
doaj   +1 more source

Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing [PDF]

, 2002
Chris Allton, Stephen Booth, K. C. Bowler, Joyce Garden, A. Hart, D. J. Hepburn, A.C. Irving, Bálint Joó, R.D. Kenway, C.M. Maynard, Craig McNeile, C. Michael, Stephen Pickles, James C. Sexton, Kieran J. Sharkey, Z. Sroczynski, M. Talevi, M. Teper, Hartmut Wittig   +18 more
openalex   +1 more source

Nonperturbative effects in semileptonicBcdecays [PDF]

, 2002
Thomas Mannel, S. Wolf
openalex   +1 more source

Precocious scaling and nonperturbative effects in QCD

Zeitschrift für Physik C Particles and Fields, 1983
The onset of nonperturbative effects in QCD is studied in two ways: (1) by means of the nonvanishing vacuum expectation value of 〈g2F2〉 introduced by Shifman, Vainshtein and Zakharov; (2) using a finite energy sum rule (FESR) for the renormalization group function β.
openaire   +2 more sources

Nonperturbative region of effective strong coupling

, 2013
In the framework of Poincar covariant quark model the behavior of running coupling constant $ _{s}\left(Q^{2}\right)$ is considered in $Q < 1 \mbox{GeV}$ region. An analysis was carried out for pseudoscalar and vector mesons with lepton decay constants, masses (obtained from model dependent) and nucleon spin rules required to match their ...
openaire   +2 more sources

Sudakov logs and power corrections for selected event shapes

, 2004
I summarize the results of recent studies analyzing perturbative and nonperturbative effects of soft gluon radiation on the distributions of the C-parameter and of the class of angularities, by means of dressed gluon exponentiation.Comment: Talk given at
Magnea, Lorenzo
core   +1 more source