Hati, C. Kriewald, J. Orloff, J. Teixeira, A.M.

Motivated by a simultaneous explanation of the apparent discrepancies in the light charged lepton anomalous magnetic dipole moments, and the anomalous internal pair creation in $^8$Be nuclear transitions, we explore a simple New Physics model, based on an extension of the Standard Model gauge group by a $U(1)_{B-L}$. The model further includes heav...

Mannheim, Philip D. Lowdon, Peter Brodsky, Stanley J.

In this paper we compare light-front quantization and instant-time quantization both at the level of operators and at the level of their Feynman diagram matrix elements. At the level of operators light-front quantization and instant-time quantization lead to equal light-front time commutation (or anticommutation) relations that appear to be quite d...

Bacchetta, Alessandro Celiberto, Francesco Giovanni Radici, Marco Taels, Pieter

We present a model calculation of transverse-momentum-dependent distributions (TMDs) of gluons in the nucleon. The model is based on the assumption that a nucleon can emit a gluon, and what remains after the emission is treated as a single spectator particle. This spectator particle is considered to be on-shell, but its mass is allowed to take a co...

Giorgini, L.T. Jentschura, U.D. Malatesta, E.M. Parisi, G. Rizzo, T. Zinn-Justin, J.

For a long time, the predictive limits of perturbative quantum field theory have been limited by our inability to carry out loop calculations to arbitrarily high order, which become increasingly complex as the order of perturbation theory is increased. This problem is exacerbated by the fact that perturbation series derived from loop diagram (Feynm...

Barrau, Aurélien

In this letter, we argue that the past of the Universe, extrapolated from standard physics and measured cosmological parameters, might be a non-singular bounce. We also show that, in this framework, quite stringent constraints can be put on the reheating temperature and number of inflationary e-folds, basically fixing $T_{RH}\sim T_{GUT}$ and $N\si...

Bielčíková, Jana Kunnawalkam Elayavalli, Raghav Ponimatkin, Georgy Putschke, Jörn H. Šivic, Josef

Jets of collimated particles arising from hard scattered partons have been studied extensively in hadron collisions. Jets serve a multitude of purposes as they are utilized in fundamental studies of the Standard Model (SM) and in searches for new particles. Recently, studies of jet interaction with the quark-gluon plasma (QGP) created in high energ...

Khosa, Charanjit K. Kraml, Sabine Lessa, Andre Neuhuber, Philipp Waltenberger, Wolfgang

We present an update of the SModelS database with simplified model results from 13 ATLAS and 10 CMS searches for supersymmetry at Run 2. This includes 5 ATLAS and 1 CMS analyses for full Run 2 luminosity, i.e. close to 140/fb of data. In total, 76 official upper limit and efficiency map results have been added. Moreover, 21 efficiency map results h...

Descotes-Genon, Sébastien Fajfer, Svjetlana Kamenik, Jernej F. Novoa-Brunet, Martín

We investigate the consequences of deviations from the Standard Model observed in $b\to s\mu\mu$ transitions for flavour-changing neutral-current processes involving down-type quarks and neutrinos. We derive the relevant Wilson coefficients within an effective field theory approach respecting the SM gauge symmetry, including right-handed currents, ...

Lacroix, Thomas Núñez-Castiñeyra, Arturo Stref, Martin Lavalle, Julien Nezri, Emmanuel

Reducing theoretical uncertainties in Galactic dark matter (DM) searches is an important challenge as several experiments are now delving into the parameter space relevant to popular (particle or not) candidates. Since many DM signal predictions rely on the knowledge of the DM velocity distribution---direct searches, capture by stars, $p$-wave-supp...

Lees, J.P. Poireau, V. Tisserand, V. Grauges, E. Palano, A. Eigen, G. Kolomensky, Yu.G. Fritsch, M. Koch, H. Schroeder, T.
...

Many scenarios of physics beyond the Standard Model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an $e^+e^...