Prospects of indirect searches for dark matter annihilations in the earth with ICAL@INO

Tiwari, Deepak; Choubey, Sandhya; Ghosh, A.

doi:10.1007/jhep05(2019)039

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…Using this good detector response, the ICAL Collaboration has performed various analyses involving standard oscillations using JHEP03(2022)050 atmospheric neutrino [78,[81][82][83][84][85][86][87][88][89][90]. ICAL provides a unique avenue to probe a plethora of BSM scenarios [49,53,[91][92][93][94][95][96][97][98]. In the context of searching the signature of CPT violation at ICAL, a dedicated work has been performed in ref.…”

Section: Jhep03(2022)050mentioning

confidence: 99%

Probing Lorentz Invariance Violation with atmospheric neutrinos at INO-ICAL

Sahoo

Kumar

Agarwalla

2022

J. High Energ. Phys.

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The possibility of Lorentz Invariance Violation (LIV) may appear in unified theories, such as string theory, which allow the existence of a new space-time structure at the Planck scale (Mp ∼ 1019 GeV). This effect can be observed at low energies with a strength of ∼ 1/Mp using the perturbative approach. In the minimal Standard Model extension (SME) framework, the neutrino mass-induced flavor oscillation gets modified in the presence of LIV. The Iron Calorimeter (ICAL) detector at the proposed India-based Neutrino Observatory (INO) offers a unique window to probe these LIV parameters by observing atmospheric neutrinos and antineutrinos separately over a wide range of baselines in the multi-GeV energy range. In this paper, for the first time, we study in detail how the CPT-violating LIV parameters (aμτ, aeμ, aeτ) can alter muon survival probabilities and expected μ− and μ+ event rates at ICAL. Using 500 kt·yr exposure of ICAL, we place stringent bounds on these CPT-violating LIV parameters at 95% C.L., which are slightly better than the present Super-Kamiokande limits. We demonstrate the advantage of incorporating hadron energy information and charge identification capability at ICAL while constraining these LIV parameters. Further, the impact of the marginalization over the oscillation parameters and choice of true values of sin2θ23 on LIV constraints is described. We also study the impact of these LIV parameters on mass ordering determination and precision measurement of atmospheric oscillation parameters.

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Section: Jhep03(2022)050mentioning

confidence: 99%

Probing Lorentz Invariance Violation with atmospheric neutrinos at INO-ICAL

Sahoo

Kumar

Agarwalla

2022

J. High Energ. Phys.

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“…Then, it is important to estimate the CR value by massive bodies as much as possible. CR for different kind of round massive bodies like the Moon 28,33 , planets (like Earth and exoplanets), 25,[34][35][36] the Sun, 23,37,38 other stars, 6,7,[39][40][41][42][43] compact stars 12,13,44,45 are estimated in the litterature.…”

Section: Introductionmentioning

confidence: 99%

Capture rate of weakly interacting massive particles (WIMPs) in binary star systems

Hassani,

Ebadi,

Pazhouhesh

et al. 2020

Preprint

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Distribution of dark matter (DM) inside galaxies is not uniform. Near the central regions, its density is the highest. Then, it seems logical to suppose that, DM affects the physics of stars of central regions more than other regions. Besides, current stellar evolutionary models did not consider DM effects in their assumptions. To consider the DM effects, at first one must estimate how much DM a star contains. The capture rate (CR) of DM particles by individual stars was investigated before this study in the literature. In this work, we discuss how CR can be affected when stars are members of binary star systems (BSS), instead of studing them individualy.When a star is a member of a BSS, its speed changes periodically due to the elliptical motion around its companion star. In this work, we investigated CR by BSSs in different binary star system configurations. In the end, we discussed observational signatures that can be attributed to the DM effect in binary systems.

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Constraining non-unitary neutrino mixing using matter effects in atmospheric neutrinos at INO-ICAL

Sahoo,

Das,

Kumar

et al. 2024

J. High Energ. Phys.

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The mass-induced neutrino oscillation is a well established phenomenon that is based on the unitary mixing among three light active neutrinos. Remarkable precision on neutrino mixing parameters over the last decade or so has opened up the prospects for testing the possible non-unitarity of the standard 3ν mixing matrix, which may arise in the seesaw extensions of the Standard Model due to the admixture of three light active neutrinos with heavy isosinglet neutrinos. Because of this non-unitary neutrino mixing (NUNM), the oscillation probabilities among the three active neutrinos would be altered as compared to the probabilities obtained assuming a unitary 3ν mixing matrix. In such a NUNM scenario, neutrinos can experience an additional matter effect due to the neutral current interactions with the ambient neutrons. Atmospheric neutrinos having access to a wide range of energies and baselines can experience a significant modifications in Earth’s matter effect due to NUNM. In this paper, we study in detail how the NUNM parameter α32 affects the muon neutrino and antineutrino survival probabilities in a different way. Then, we place a comparable and complementary constraint on α32 in a model independent fashion using the proposed 50 kt magnetized Iron Calorimeter (ICAL) detector under the India-based Neutrino Observatory (INO) project, which can efficiently detect the atmospheric νμ and $$ {\overline{\nu}}_{\mu } $$ ν ¯ μ separately in the multi-GeV energy range. Further, we discuss the advantage of charge identification capability of ICAL and the impact of uncertainties in oscillation parameters while constraining α32. We also compare the α32 sensitivity of ICAL with that of future long-baseline experiments DUNE and T2HK in isolation and combination.

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Prospects of indirect searches for dark matter annihilations in the earth with ICAL@INO

Cited by 4 publications

References 45 publications

Probing Lorentz Invariance Violation with atmospheric neutrinos at INO-ICAL

Probing Lorentz Invariance Violation with atmospheric neutrinos at INO-ICAL

Capture rate of weakly interacting massive particles (WIMPs) in binary star systems

Constraining non-unitary neutrino mixing using matter effects in atmospheric neutrinos at INO-ICAL

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