First results from DAMA/LIBRA and the combined results with DAMA/NaI

Bernabei, R.; Belli, P.; Cappella, F.; Cerulli, R.; Dai, C. J.; d’Angelo, A.; He, H.; Incicchitti, A.; Kuang, H. H.; Ma, Xinhua; Montecchia, F.; Nozzoli, F.; Prosperi, D.; Sheng, X. D.; Ye, Z.P.

doi:10.1140/epjc/s10052-008-0662-y

Cited by 1,076 publications

(1,886 citation statements)

References 109 publications

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“…If for some reason, this Bterm is suppressed compared to the B − L conserving mass terms for the sneutrinos, it will split the CP-odd and CP-even states by a small amount. This could give rise to an inelastic sneutrino dark matter scenario which could explain the positive signal at DAMA [47] while being consistent with the negative results of other direct detection experiments such as CDMS, XENON, ZEPLIN, KIMS and CRESST. Such a possibility was pointed out in [48].…”

Section: Jhep05(2009)083supporting

confidence: 87%

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Kumar¹

2009

J. High Energy Phys.

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Neutrino masses, Baryon asymmetry, dark matter and the moduli problem -A complete framework E-mail: kpiyush@berkeley.eduAbstract: Recent developments in string theory have led to "realistic" string compactifications which lead to moduli stabilization while generating a hierarchy between the Electroweak and Planck scales at the same time. However, this seems to suggest a rethink of our standard notions of cosmological evolution after the end of inflation and before the beginning of BBN. This epoch is crucial for addressing the issues of neutrino masses, baryon asymmetry, Dark Matter (DM) abundance and the moduli (gravitino) problem. We argue that within classes of realistic string compactifications as defined above, there generically exists a light modulus with a mass comparable to that of the gravitino which is typically much smaller than the Hubble parameter during inflation. Therefore, it is destabilized and generates a large late-time entropy when it decays. Thus, all known elegant mechanisms of generating the baryon asymmetry of the Universe in the literature have to take this fact into account.In this work, we find that it is still possible to naturally generate the observed baryon asymmetry of the Universe as well as light left-handed neutrino masses from a period of Affleck-Dine (AD) leptogenesis shortly after the end of inflation, in classes of realistic string constructions with a minimal extension of the MSSM below the unification scale (consisting only of right-handed neutrinos) and satisfying certain microscopic criteria described in the text. The AD mechanism has already been used to generate the baryon asymmetry in the literature; however in this work we have embedded the above mechanism within a framework well motivated from string theory and have tried to describe the epoch from the end of inflation to the beginning of BBN in a complete and self-consistent manner. The consequences of our analysis are as follows. The lightest left-handed neutrino is required to be virtually massless. The moduli (gravitino) problem can be naturally solved in this framework both within gravity and gauge mediation. The observed upper bound on the relic abundance constrains the moduli-matter and moduli-gravitino couplings since the DM is produced non-thermally within this framework. Finally, although not a definite prediction, the framework naturally allows a light right-handed neutrino and sneutrinos around the electroweak scale which could have important implications for the nature of DM as well as the LHC.

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Section: Jhep05(2009)083supporting

confidence: 87%

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Kumar¹

2009

J. High Energy Phys.

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“…Accelerator and direct detection experiments are most sensitive to DM particles with mass below a few hundred GeV. Positive results for signals of ∼10 GeV DM reported by some direct-searches experiments [7][8][9][10] could not be confirmed by other detectors, and are in tension with results obtained by XENON100 [11,12] and LUX [13]. On the other hand, the rather heavy Higgs boson [14] and the lack of indications of new physics at the Large Hadron Collider, strongly constrain the existence of a WIMP at the electroweak scale.…”

Section: Introductionmentioning

confidence: 91%

Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC

Aleksić

2016

Springer Theses

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Abstract. We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf galaxy performed so far in the very high energy range of the electromagnetic spectrum. We search this large data sample for signals of dark matter particles in the mass range between 100 GeV and 20 TeV. For this we use the full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral features, like those expected from dark matter annihilation or decay. In particular, we focus our search on gamma-rays produced from different final state Standard Model particles, annihilation with internal bremsstrahlung, monochromatic lines and box-shaped signals. Our results represent the most stringent constraints to the annihilation cross-section or decay lifetime obtained from observations of satellite galaxies, for masses above few hundred GeV. In particular, our strongest limit (95% confidence level) corresponds to a ∼500 GeV dark matter particle annihilating into τ + τ − , and is of order σ ann v ≃ 1.2×10 −24 cm 3 s −1 -a factor ∼40 above the σ ann v thermal value.

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“…We use in this analysis the 12-bin data from figure 9 of [94]. The quenching factors q Na and q I are taken to be free parameters in our analysis, which we vary over their respective allowed range [95,96], as reported in table 2.…”

Section: Cdms On Germaniummentioning

confidence: 99%

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Arina

Sahu

2012

Nuclear Physics B

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Abstract. The nature of dark matter (DM) particles and the mechanism that provides their measured relic abundance are currently unknown. In this paper we investigate inert scalar and vector like fermion doublet DM candidates with a charge asymmetry in the dark sector, which is generated by the same mechanism that provides the baryon asymmetry, namely baryogenesis-via-leptogenesis induced by decays of scalar triplets. At the same time the model gives rise to neutrino masses in the ballpark of oscillation experiments via type II seesaw. We discuss possible sources of depletion of asymmetry in the DM and visible sectors and solve the relevant Boltzmann equations for quasi-equilibrium decay of triplet scalars. A Monte-Carlo-Markov-Chain analysis is performed for the whole parameter space. The survival of the asymmetry in the dark sector leads to inelastic scattering off nuclei. We then apply bayesian statistic to infer the model parameters favoured by the current experimental data, in particular the DAMA annual modulation and Xenon100 exclusion limit. The latter strongly disfavours asymmetric scalar doublet DM of mass O( TeV) as required by DM-DM oscillations, while an asymmetric vector like fermion doublet DM with mass around 100 GeV is a good candidate for DAMA annual modulation yet satisfying the constraints from Xenon100 data.

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First results from DAMA/LIBRA and the combined results with DAMA/NaI

Cited by 1,076 publications

References 109 publications

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

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