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Silva, M.ORCID iD iconorcid.org/0000-0002-1554-9579
Publications (2 of 2) Show all publications
Aprile, E., Aalbers, J., Agostini, F., Alfonsi, M., Althueser, L., Amaro, F. D., . . . Schwenk, A. (2019). First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment. Physical Review Letters, 122(7), Article ID 071301.
Open this publication in new window or tab >>First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment
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2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 7, article id 071301Article in journal (Refereed) Published
Abstract [en]

We present first results on the scalar coupling of weakly interacting massive particles (WIMPs) to pions from 1 t yr of exposure with the XENON1T experiment. This interaction is generated when the WIMP couples to a virtual pion exchanged between the nucleons in a nucleus. In contrast to most nonrelativistic operators, these pion-exchange currents can be coherently enhanced by the total number of nucleons and therefore may dominate in scenarios where spin-independent WIMP-nucleon interactions are suppressed. Moreover, for natural values of the couplings, they dominate over the spin-dependent channel due to their coherence in the nucleus. Using the signal model of this new WIMP-pion channel, no significant excess is found, leading to an upper limit cross section of 6.4 x 10(-46) cm(2) (90% confidence level) at 30 GeV/c(2) WIMP mass.
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-167516 (URN)10.1103/PhysRevLett.122.071301 (DOI)000459311800003 ()30848617 (PubMedID)
Available from: 2019-04-21 Created: 2019-04-21 Last updated: 2022-02-26Bibliographically approved
Aprile, E., Aalbers, J., Agostini, F., Alfonsi, M., Amaro, F. D., Anthony, M., . . . Zhang, Y. (2017). The XENON1T dark matter experiment. European Physical Journal C, 77(12), Article ID 881.
Open this publication in new window or tab >>The XENON1T dark matter experiment
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2017 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 77, no 12, article id 881Article in journal (Refereed) Published
Abstract [en]

The XENON1T experiment at the Laboratori Nazionali del Gran Sasso (LNGS) is the first WIMP dark matter detector operating with a liquid xenon target mass above the ton-scale. Out of its 3.2t liquid xenon inventory, 2.0t constitute the active target of the dual-phase time projection chamber. The scintillation and ionization signals from particle interactions are detected with low-background photomultipliers. This article describes the XENON1T instrument and its subsystems as well as strategies to achieve an unprecedented low background level. First results on the detector response and the performance of the subsystems are also presented.
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-152625 (URN)10.1140/epjc/s10052-017-5326-3 (DOI)000418433200002 ()
Available from: 2018-02-06 Created: 2018-02-06 Last updated: 2022-03-23Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1554-9579

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