Results 51 to 60 of about 41,024 (166)

Electroweak Sudakov corrections at 2 loop level

, 2001
In processes at the energy much higher than electroweak scale, weak boson mass act as the infrared cutoff in weak boson loops and resulting Sudakov log corrections can be as large as 10%.
Kawamura, Hiroyuki
core   +1 more source

Supersymmetric and non-supersymmetric models without catastrophic Goldstone bosons [PDF]

, 2017
The calculation of the Higgs mass in general renormalisable field theories has been plagued by the so-called "Goldstone Boson Catastrophe", where light (would-be) Goldstone bosons give infra-red divergent loop integrals.
Braathen, Johannes, Goodsell, Mark D., Staub, Florian   +2 more
core   +4 more sources

Dark Dimension With (Little) Strings Attached

Fortschritte der Physik, Volume 73, Issue 4, April 2025.
Abstract A relation between dark energy and the scale of new physics in weakly coupled string theory is motivated. This mixing between infrared and ultraviolet physics leads to a unique corner for real‐world phenomenology: barring fine‐tunings, the authors are naturally led to the “dark dimension” scenario, a single mesoscopic extra dimension of micron
Ivano Basile, Dieter Lüst
wiley   +1 more source

Tri-boson and WH production in the W + W + jj channel: predictions at full NLO accuracy and beyond

Journal of High Energy Physics
In this work, we present the first full NLO predictions for the process pp → μ + ν μ e+ ν ejj at the LHC in a typical tri-boson phase space. The NLO corrections reach 50% at the level of the fiducial cross section and have a very different hierarchy with
Ansgar Denner, Mathieu Pellen, Marek Schönherr, Steffen Schumann   +3 more
doaj   +1 more source

Feynman integrals from positivity constraints

Journal of High Energy Physics, 2023
We explore inequality constraints as a new tool for numerically evaluating Feynman integrals. A convergent Feynman integral is non-negative if the integrand is non-negative in either loop momentum space or Feynman parameter space.
Mao Zeng
doaj   +1 more source

Electroweak Precision Observables within a Fourth Generation Model with General Flavour Structure

, 2012
We calculate the contributions to electroweak precision observables (EWPOs) due to a fourth generation of fermions with the most general (quark-)flavour structure (but assuming Dirac neutrinos and a trivial flavour structure in the lepton sector).
A. Czarnecki, A. Djouadi, A. Djouadi, A. Freitas, A. Freitas, A. Rozanov, A. Sirlin, A. Soni, A. Soni, A.B. Arbuzov, A.J. Buras, A.J. Buras, B. Holdom, B. Holdom, B.A. Kniehl, B.A. Kniehl, B.A. Kniehl, D. Bardin, D.Y. Bardin, F. Aguila del, F. Halzen, G. Barenboim, G. Degrassi, G. Degrassi, G. Degrassi, G. Montagna, G.C. Branco, G.D. Kribs, H. Lacker, H.-J. He, I. Maksymyk, J. Alwall, J. Erler, J. Fleischer, J. Rohrwild, K. Belotsky, K. Chetyrkin, K. Chetyrkin, K. Nakamura, M. Awramik, M. Awramik, M. Awramik, M. Bobrowski, M. Bohm, M. Böhm, M. Faisst, M. Maltoni, M. Wiebusch, M.E. Peskin, M.S. Chanowitz, O. Eberhardt, P. González, P.H. Frampton, R. Barbieri, R. Barbieri, R. Harlander, T. Hahn, T. Hahn, T. Hahn, V. Novikov, V. Novikov, V.A. Novikov, W.-S. Hou, W.-S. Hou, W.-Y. Keung   +64 more
core   +1 more source

Visible GeV ALP from TeV Vector‐Like Leptons

Fortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi, Marta Fuentes Zamoro, Luca Merlo   +2 more
wiley   +1 more source

NLO QCD and EW corrections to vector-boson scattering into W+W − at the LHC

Journal of High Energy Physics, 2022
We present the full next-to-leading-order electroweak and QCD corrections to vector-boson scattering into a pair of off-shell opposite-sign W bosons decaying into leptons of different flavour at the LHC.
Ansgar Denner, Robert Franken, Timo Schmidt, Christopher Schwan   +3 more
doaj   +1 more source

Modified Higgs Sectors and NLO Associated Production

, 2013
Many beyond the Standard Model (BSM) scenarios involve Higgs couplings to additional electroweak fields. It is well established that these new fields may modify Higgs gamma-gamma and gamma-Z decays at one-loop.
Englert, Christoph, McCullough, Matthew
core   +1 more source

Electroweak Baryon Number Non-Conservation in the Early Universe and in High Energy Collisions [PDF]

, 1996
We review recent progress in the study of the anomalous baryon number non-conservation at high temperatures and in high energy collisions. Recent results on high temperature phase transitions are described, and applications to electroweak baryogenesis ...
Rubakov, V. A., Shaposhnikov, M. E.
core   +3 more sources