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Showing 2017 · hep-phShow all

25 papers · 2 filters

hep-ph2017★ 20 cited

Sum rules across the unpolarized Compton processes involving generalized polarizabilities and moments of nucleon structure functions

Vadim Lensky, Franziska Hagelstein, Vladimir Pascalutsa +1

We derive two new sum rules for the unpolarized doubly virtual Compton scattering process on a nucleon, which establish novel low- relations involving the nucleon's generalize…

hep-ph2017★ 39 cited

GeV-scale hot sterile neutrino oscillations: a numerical solution

J. Ghiglieri, M. Laine

The scenario of baryogenesis through GeV-scale sterile neutrino oscillations is governed by non-linear differential equations for the time evolution of a sterile neutrino density m…

hep-ph2017★ 50 cited

Status of rates and rate equations for thermal leptogenesis

Simone Biondini, Dietrich Bodeker, Nora Brambilla +8

In many realizations of leptogenesis, heavy right-handed neutrinos play the main role in the generation of an imbalance between matter and antimatter in the early Universe. Hence,…

hep-ph2017★ 5 cited

Hadronic light-by-light contribution to : a dispersive approach

Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura +1

After a brief introduction on ongoing experimental and theoretical activities on , we report on recent progress in approaching the calculation of the hadronic light-by-lig…

hep-ph2017★ 26 cited

Dissecting the hadronic contributions to by Schwinger's sum rule

Franziska Hagelstein, Vladimir Pascalutsa

The theoretical uncertainty of is currently dominated by hadronic contributions. In order to express those in terms of directly measurable quantities, we consider a sum r…

hep-ph2017★ 172 cited

Search for axion-like dark matter through nuclear spin precession in electric and magnetic fields

C. Abel, N. J. Ayres, G. Ban +45

We report on a search for ultra-low-mass axion-like dark matter by analysing the ratio of the spin-precession frequencies of stored ultracold neutrons and Hg atoms for an a…

hep-ph2017★ 18 cited

Non-global and rapidity logarithms in narrow jet broadening

Thomas Becher, Rudi Rahn, Ding Yu Shao

We derive an all-order factorization theorem for the narrow jet broadening event shape, a measure of the transverse momentum in jet events. This is a non-global observable which re…

hep-ph2017★ 7 cited

Leptogenesis and composite heavy neutrinos with gauge mediated interactions

Simone Biondini, Orlando Panella

Leptogenesis is an appealing framework to account for the baryon asymmetry in the universe. To this end physics beyond the Standard Model is demanded. In this paper we investigate…

hep-ph2017★ 44 cited

Re-derived overclosure bound for the inert doublet model

S. Biondini, M. Laine

We apply a formalism accounting for thermal effects (such as modified Sommerfeld effect; Salpeter correction; decohering scatterings; dissociation of bound states), to one of the s…

hep-ph2017★ 84 cited

Extracting the sigma-term from low-energy pion-nucleon scattering

Jacobo Ruiz de Elvira, Martin Hoferichter, Bastian Kubis +1

We present an extraction of the pion-nucleon () scattering lengths from low-energy scattering, by fitting a representation based on Roy-Steiner equations to the low-energy…

hep-ph2017★ 23 cited

Pulse shape optimization for electron-positron production in rotating fields

François Fillion-Gourdeau, Florian Hebenstreit, Denis Gagnon +1

We optimize the pulse shape and polarization of time-dependent electric fields to maximize the production of electron-positron pairs via strong field quantum electrodynamics proces…

hep-ph2017★ 147 cited

B physics Beyond the Standard Model at One Loop: Complete Renormalization Group Evolution below the Electroweak Scale

Jason Aebischer, Matteo Fael, Christoph Greub +1

General analyses of -physics processes beyond the Standard Model require accounting for operator mixing in the renormalization-group evolution from the matching scale down to th…

hep-ph2017★ 121 cited

Gauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality

Alejandro Celis, Javier Fuentes-Martin, Avelino Vicente +1

We study the implications of the recent measurements of and by the LHCb collaboration. We do that by adopting a model-independent approach based on the Standard Mod…

hep-ph2017★ 343 cited

Patterns of New Physics in transitions in the light of recent data

Bernat Capdevila, Andreas Crivellin, Sébastien Descotes-Genon +2

In the Standard Model (SM), the rare transitions where a bottom quark decays into a strange quark and a pair of light leptons exhibit a potential sensitivity to physics beyond the…

hep-ph2017★ 29 cited

Patterns and partners for chiral symmetry restoration

A. Gomez Nicola, J. Ruiz de Elvira

We present and analyze a new set of Ward Identities which shed light on the distinction between different patterns of chiral symmetry restoration in QCD, namely vs $O(4)\tim…

hep-ph2017★ 191 cited

DsixTools: The Standard Model Effective Field Theory Toolkit

Alejandro Celis, Javier Fuentes-Martin, Avelino Vicente +1

We present DsixTools, a Mathematica package for the handling of the dimension-six Standard Model Effective Field Theory. Among other features, DsixTools allows the user to perform…

hep-ph2017★ 9 cited

The MSSM without Gluinos; an Effective Field Theory for the Stop Sector

Jason Aebischer, Andreas Crivellin, Christoph Greub +1

In this article we study the MSSM with stops and Higgs scalars much lighter than gluinos and squarks of the first two generations. In this setup, one should use an effective field…

hep-ph2017★ 61 cited

GeV-scale hot sterile neutrino oscillations: a derivation of evolution equations

J. Ghiglieri, M. Laine

Starting from operator equations of motion and making arguments based on a separation of time scales, a set of equations is derived which govern the non-equilibrium time evolution…

hep-ph2017★ 14 cited

A light sneutrino rescues the light stop

Mikael Chala, Antonio Delgado, Germano Nardini +1

Stop searches in supersymmetric frameworks with -parity conservation usually assume the lightest neutralino to be the lightest supersymmetric particle. In this paper we consider…

hep-ph2017★ 65 cited

Thermal phase transition with full 2-loop effective potential

M. Laine, M. Meyer, G. Nardini

Theories with extended Higgs sectors constructed in view of cosmological ramifications (gravitational wave signal, baryogenesis, dark matter) are often faced with conflicting requi…

hep-ph2017★ 440 cited

Dispersion relation for hadronic light-by-light scattering: two-pion contributions

Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura +1

In this third paper of a series dedicated to a dispersive treatment of the hadronic light-by-light (HLbL) tensor, we derive a partial-wave formulation for two-pion intermediate sta…

hep-ph2017★ 8 cited

Momentum anisotropy effects for quarkonium in a weakly-coupled quark-gluon plasma below the melting temperature

Simone Biondini, Nora Brambilla, Miguel Angel Escobedo +1

In the early stages of heavy-ion collisions, the hot QCD matter expands more longitudinally than transversely. This imbalance causes the system to become rapidly colder in the long…

hep-ph2017★ 146 cited

Rescattering effects in the hadronic-light-by-light contribution to the anomalous magnetic moment of the muon

Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura +1

We present a first model-independent calculation of intermediate states in the hadronic-light-by-light (HLbL) contribution to the anomalous magnetic moment of the muon $(g-2)_…

hep-ph2017★ 58 cited

Form Factors from Light-Cone Sum Rules with -meson Distribution Amplitudes

Shan Cheng, Alexander Khodjamirian, Javier Virto

We study form factors using QCD light-cone sum rules with -meson distribution amplitudes. These form factors describe the semileptonic decay ,…