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Prospects of indirect searches for dark matter at INO
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0002-6071-8546
Univ Tecn Federico Santa Maria, Dept Fis, Casilla 110-5,Avda Espana 1680, Valparaiso, Chile..
Harish Chandra Res Inst HBNI, Chhatnag Rd, Allahabad 211019, Uttar Pradesh, India..
2018 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 5, article id 006Article in journal (Refereed) Published
Abstract [en]

The annihilation of Weakly Interactive Massive Particles (WIMP) in the centre of the sun could give rise to neutrino fluxes. We study the prospects of searching for these neutrinos at the upcoming Iron CALorimeter (ICAL) detector to be housed at the India-based Neutrino Observatory (INO). We perform ICAL simulations to obtain the detector efficiencies and resolutions in order to simulate muon events in ICAL due to neutrinos coming from annihilation of WIMP in the mass range m(chi) = (3 - 100) GeV. The atmospheric neutrinos pose a major background for these indirect detection studies and can be reduced using the fact that the signal comes only from the direction of the sun. For a given WIMP mass, we find the opening angle theta(90) such that 90 % of the signal events are contained within this angle and use this cone-cut criteria to reduce the atmospheric neutrino background. The reduced background is then weighted by the solar exposure function at INO to obtain the final background spectrum for a given WIMP mass. We perform a chi(2) analysis and present expected exclusion regions in the sigma(SD) - m(chi) and sigma(SI) - m(chi), where sigma(SD) and sigma(SI) are the WIMP-nucleon Spin-Dependent (SD) and Spin-Independent (SI) scattering cross-section, respectively. For a 10 years exposure and m(chi) = 25 GeV, the expected 90 % C. L. exclusion limit is found to be sigma(SD) < 6.87 x 10(-41) cm(2) and sigma(SI) < 7.75 x 10(-43) cm(2) for the tau(+) tau(-) annihilation channel and sigma(SD) < 1.14 x 10(-39) cm(2) and sigma(SI) < 1.30 x 10(-41) cm(2) for the b (b) over bar channel, assuming 100 % branching ratio for each of the WIMP annihilation channel.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2018. no 5, article id 006
Keywords [en]
dark matter experiments, neutrino detectors, neutrino experiments, solar and atmospheric neutrinos
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-228275DOI: 10.1088/1475-7516/2018/05/006ISI: 000431375800006Scopus ID: 2-s2.0-85048097314OAI: oai:DiVA.org:kth-228275DiVA, id: diva2:1209021
Note

QC 20180521

Available from: 2018-05-21 Created: 2018-05-21 Last updated: 2018-10-16Bibliographically approved

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Choubey, Sandhya

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