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dc.contributor.author
NA64 Collaboration
dc.contributor.author
Cazzaniga, Cesare
dc.contributor.author
Odagiu, Patrick
dc.contributor.author
Depero, Emilio
dc.contributor.author
Molina Bueno, Laura
dc.contributor.author
Crivelli, Paolo
dc.contributor.author
Radics, Balint
dc.contributor.author
Rubbia, André
dc.contributor.author
Sieber, Henri
dc.date.accessioned
2021-11-11T08:52:45Z
dc.date.available
2021-11-10T04:14:53Z
dc.date.available
2021-11-11T08:52:45Z
dc.date.issued
2021
dc.identifier.issn
1434-6044
dc.identifier.issn
1434-6052
dc.identifier.other
10.1140/epjc/s10052-021-09705-5
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/514581
dc.identifier.doi
10.3929/ethz-b-000514581
dc.description.abstract
We report the results of a search for a new vector boson (A) decaying into two dark matter particles χ1χ2 of different mass. The heavier χ2 particle subsequently decays to χ1 and an off-shell Dark Photon A∗ → e+e−. For a sufficiently large mass splitting, this model can explain in terms of new physics the recently confirmed discrepancy observed in the muon anomalous magnetic moment at Fermilab. Remarkably, it also predicts the observed yield of thermal dark matter relic abundance. A detailed Monte-Carlo simulation was used to determine the signal yield and detection efficiency for this channel in the NA64 setup. The results were obtained reanalyzing the previous NA64 searches for an invisible decay A → χχ and axion-like or pseudo-scalar particles a → γ γ . With this method, we exclude a significant portion of the parameter space justifying the muon g-2 anomaly and being compatible with the observed dark matter relic density for A masses from 2me up to 390 MeV and mixing parameter ε between 3 × 10−5 and 2 × 10−2.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-10-30
ethz.journal.title
The European Physical Journal C
ethz.journal.volume
81
en_US
ethz.journal.issue
10
en_US
ethz.journal.abbreviated
Eur. Phys. J. C
ethz.pages.start
959
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
NA64 - Search for Dark Sectors in Missing Energy Events
en_US
ethz.grant
NA64 - Searching for Dark Sectors at the CERN SPS
en_US
ethz.grant
Development of Data Acquisition Systems based on Silicon Photomultipliers readouts to search for dark sectors in NA64 at CERN
en_US
ethz.grant
Study of Exotic Matter
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
New York
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::03503 - Rubbia, André / Rubbia, André
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::03503 - Rubbia, André / Rubbia, André
ethz.grant.agreementno
169133
ethz.grant.agreementno
186181
ethz.grant.agreementno
186158
ethz.grant.agreementno
197346
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.grant.program
FLARE
ethz.grant.program
Ambizione
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.date.deposited
2021-11-10T04:20:57Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-11-11T08:52:52Z
ethz.rosetta.lastUpdated
2021-11-11T08:52:52Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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