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We compute the electromagnetic radiative corrections to all leading annihilation processes which may occur in the Galactic dark matter halo, for dark matter in the framework of supersymmetric extensions of the Standard Model (MSSM and…

High Energy Physics - Phenomenology · Physics 2008-11-26 Torsten Bringmann , Lars Bergstrom , Joakim Edsjo

We present formalism necessary to determine weak-scale matching coefficients in the computation of scattering cross sections for putative dark matter candidates interacting with the Standard Model. Particular attention is paid to the…

High Energy Physics - Phenomenology · Physics 2015-03-05 Richard J. Hill , Mikhail P. Solon

The recent measurement by the CDF Collaboration of the $W$ boson mass is in significant tension with the Standard Model expectation, showing a discrepancy of seven standard deviations. A larger value of $m_W$ affects the global electroweak…

High Energy Physics - Phenomenology · Physics 2022-09-08 Linda M. Carpenter , Taylor Murphy , Matthew J. Smylie

If the Dark Matter (DM) in the Universe has interactions with the standard-model particle, the pair annihilation may give the imprints in the cosmic ray. In this paper we study the pair annihilation processes of the DM, which is neutral,…

High Energy Physics - Phenomenology · Physics 2010-04-06 Junji Hisano , Shigeki Matsumoto , Mihoko M. Nojiri

Many beyond the Standard Model theories include a stable dark matter candidate that yields missing / invisible energy in collider detectors. If observed at the Large Hadron Collider, we must determine if its mass and other properties (and…

High Energy Physics - Phenomenology · Physics 2008-11-26 Hsin-Chia Cheng , Dalit Engelhardt , John F. Gunion , Zhenyu Han , Bob McElrath

Weakly Interacting Massive Particles (WIMPs) are one of the leading candidates for Dark Matter. We developed a model-independent method for determining the WIMP mass by using data (i.e., measured recoil energies) of direct detection…

High Energy Physics - Phenomenology · Physics 2009-02-02 Manuel Drees , Chung-Lin Shan

The complementarity of direct, indirect and collider searches for dark matter has improved our understanding concerning the properties of the dark matter particle. I will review the basic concepts that these methods rely upon and highlight…

High Energy Physics - Phenomenology · Physics 2016-05-31 Farinaldo S. Queiroz

Classical scale invariance is one of the possible solutions to explain the origin of the electroweak scale. The simplest extension is the classically scale-invariant standard model augmented by a multiplet of gauge singlet real scalar. In…

High Energy Physics - Phenomenology · Physics 2016-11-01 Kazuhiro Endo , Koji Ishiwata

Cosmological mechanisms that yield ultralight dark matter are insensitive to the intrinsic parity of a bosonic dark matter candidate, but that same quantity plays a crucial role in a direct detection experiment. The modification of…

High Energy Physics - Phenomenology · Physics 2021-09-20 Christopher M. Donohue , Susan Gardner , Wolfgang Korsch

We revisit a recently proposed scale invariant extension of the standard model, in which the scalar bi-linear condensate in a strongly interacting hidden sector dynamically breaks scale symmetry, thereby triggering electroweak symmetry…

High Energy Physics - Phenomenology · Physics 2018-03-20 Jisuke Kubo , Qidir Maulana Binu Soesanto , Masatoshi Yamada

We present a new module of micrOMEGAs devoted to the computation of indirect signals from dark matter annihilation in any new model with a stable weakly interacting particle. The code provides the mass spectrum, cross-sections, relic…

High Energy Physics - Phenomenology · Physics 2011-01-17 G. Belanger , F. Boudjema , P. Brun , A. Pukhov , S. Rosier-Lees , P. Salati , A. Semenov

The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak…

High Energy Physics - Phenomenology · Physics 2011-10-27 Paolo Ciafaloni , Marco Cirelli , Denis Comelli , Andrea De Simone , Antonio Riotto , Alfredo Urbano

Although various pieces of indirect evidence about the nature of dark matter have been collected, its direct detection has eluded experimental searches despite extensive effort. If the mass of dark matter is below 1 MeV, it is essentially…

Quantum Physics · Physics 2013-12-16 C. Jess Riedel

This is a review of electroweak precision physics with particular emphasis on low-energy precision measurements in the neutral current sector of the electroweak theory and includes future experimental prospects and the theoretical…

High Energy Physics - Phenomenology · Physics 2015-06-15 Jens Erler , Shufang Su

We investigate an extension of the Standard Model (SM) with two candidates for dark matter (DM). One of them is a real scalar field and the other is an Abelian gauge field. Except for these two, there is another beyond SM field which has…

High Energy Physics - Phenomenology · Physics 2022-04-04 Ahmad Mohamadnejad

If the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, its main annihilation channel is into W+W-, while the annihilation into light fermions is…

High Energy Physics - Phenomenology · Physics 2012-07-26 Paolo Ciafaloni , Denis Comelli , Andrea De Simone , Antonio Riotto , Alfredo Urbano

If the present dark matter in the Universe annihilates into Standard Model particles, it must contribute to the gamma ray fluxes detected on the Earth. The magnitude of such contribution depends on the particular dark matter candidate, but…

High Energy Physics - Phenomenology · Physics 2011-09-26 Álvaro de la Cruz-Dombriz , Viviana Gammaldi

Recent calculations have significantly decreased the scheme and residual scale dependence of basic radiative corrections of the Standard Electroweak Model. This leads to a theoretically accurate prediction of the W-boson mass M(W), as well…

High Energy Physics - Phenomenology · Physics 2009-10-30 G. Degrassi , P. Gambino , M. Passera , A. Sirlin

We perform a global analysis of electroweak precision measurements to find constraints on physics beyond the Standard Model. In particular, we discuss oblique parameters, which are useful to constrain additional matter fields, as well as…

High Energy Physics - Phenomenology · Physics 2007-05-23 Jens Erler

Ultralight bosonic dark matter in its most general form can be detected through its decay or annihilation to a quasimonochromatic radio line. Assuming only that this line is consistent with the most general properties of the expected phase…

Cosmology and Nongalactic Astrophysics · Physics 2025-03-04 Aya Keller , Nicole Wolff , Karl van Bibber