Journal
PHYSICS LETTERS B
Volume 718, Issue 4-5, Pages 1425-1429Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2012.12.041
Keywords
Fermi-LAT; Gamma-ray; Dark matter decay; Scalar dark matter; Dimension 6 operator
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0009021]
- Korea Institute for Advanced Study (KIAS)
- Korea government (MEST)
- National Research Foundation of Korea [2010-0009021, 2013-PG033002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The 130 GeV gamma-ray line based on tentative analyses on the Fermi-LAT data is hard to be understood with dark matter annihilation in the conventional framework of the MSSM. We point out that it can be nicely explained with two body decay of a scalar dark matter ((phi) over tilde -> gamma gamma) by the dimension 6 operator suppressed with the mass of the grand unification scale (similar to 10(16) GeV), L superset of vertical bar(phi) over tilde (DM)vertical bar(2) F mu nu F mu nu/M-GUT(2), in which the scalar dark matter (phi) over tilde (DM) develops a TeV scale vacuum expectation value. We propose a viable model explaining the 130 GeV gamma-ray line. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
Article
Astronomy & Astrophysics
Inhomogeneity of a rotating quark-gluon plasma from holography
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
PHYSICS LETTERS B (2024)
Article
Astronomy & Astrophysics
Constrain the time variation of the gravitational constant via the propagation of gravitational waves
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
PHYSICS LETTERS B (2024)
Article
Astronomy & Astrophysics
Quantum tunneling from Schwarzschild black hole in non-commutative gauge theory of gravity
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
PHYSICS LETTERS B (2024)
Article
Astronomy & Astrophysics
Compact stars: To cross or go around? That is the question
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
PHYSICS LETTERS B (2024)
Share Paper
