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Searching for low m...
Searching for low mass dark matter via phonon creation in superfluid He-4
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- Baym, Gordon (författare)
- Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.;Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.
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- Beck, D. H. (författare)
- Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
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- Filippini, Jeffrey P. (författare)
- Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
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- Pethick, Christopher (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.;Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.; Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.,Nordiska institutet för teoretisk fysik (Nordita),University of Illinois at Urbana-Champaign, USA; University of Copenhagen, Denmark
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- Shelton, Jessie (författare)
- Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
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Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA;Univ Illinois, Dept Phys, Urbana, IL 61801 USA.;Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark. Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA.;Univ Illinois, Dept Phys, Urbana, IL 61801 USA. (creator_code:org_t)
- American Physical Society (APS), 2020
- 2020
- Engelska.
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Ingår i: Physical Review D. - : American Physical Society (APS). - 1550-7998 .- 1550-2368. ; 102:3
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We consider the scattering of dark matter particles from superfluid liquid He-4, which has been proposed as a target for their direct detection. Focusing on dark matter masses below similar to 1 MeV, we demonstrate from sum-rule arguments the importance of the production of single phonons with energies. omega less than or similar to 1 meV. We show further that the anomalous dispersion of phonons in liquid He-4 at low pressures [i.e., d(2)omega(q)/dq(2) > 0, where q and omega(q) are the phonon momentum and energy] has the important consequence that a single phonon will decay over a relatively short distance into a shower of lower-energy phonons centered on the direction of the original phonon. Thus, the experimental challenge in this regime is to detect a shower of low-energy phonons, not just a single phonon. Additional information from the distribution of phonons in such a shower could enhance the determination of the dark matter mass.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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