Search for vector mediator of dark matter production in invisible decay mode

(The NA64 Collaboration)

Результат исследований: Материалы для журналаСтатья

30 Цитирования (Scopus)

Выдержка

A search is performed for a new sub-GeV vector boson (A′) mediated production of dark matter (χ) in the fixed-target experiment, NA64, at the CERN SPS. The A′, called dark photon, can be generated in the reaction e-Z→e-ZA′ of 100 GeV electrons dumped against an active target followed by its prompt invisible decay A′→χχ. The experimental signature of this process would be an event with an isolated electron and large missing energy in the detector. From the analysis of the data sample collected in 2016 corresponding to 4.3×1010 electrons on target no evidence of such a process has been found. New stringent constraints on the A′ mixing strength with photons, 10-5 ϵ 10-2, for the A′ mass range mA′ 1 GeV are derived. For models considering scalar and fermionic thermal dark matter interacting with the visible sector through the vector portal the 90% C.L. limits 10-11 y 10-6 on the dark-matter parameter y=ϵ2αD(mχmA′)4 are obtained for the dark coupling constant αD=0.5 and dark-matter masses 0.001 mχ 0.5 GeV. The lower limits αD 10-3 for pseudo-Dirac dark matter in the mass region mχ 0.05 GeV are more stringent than the corresponding bounds from beam dump experiments. The results are obtained by using exact tree level calculations of the A′ production cross sections, which turn out to be significantly smaller compared to the one obtained in the Weizsäcker-Williams approximation for the mass region mA′ 0.1 GeV.

Язык оригиналаАнглийский
Номер статьи072002
ЖурналPhysical Review D
Том97
Номер выпуска7
DOI
СостояниеОпубликовано - 1 апр 2018

Отпечаток

dark matter
decay
electrons
photons
sectors
bosons
signatures
scalars
detectors
cross sections
approximation
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Цитировать

Search for vector mediator of dark matter production in invisible decay mode. / (The NA64 Collaboration).

В: Physical Review D, Том 97, № 7, 072002, 01.04.2018.

Результат исследований: Материалы для журналаСтатья

@article{90d65bd650c741d5be90438a7e73121c,
title = "Search for vector mediator of dark matter production in invisible decay mode",
abstract = "A search is performed for a new sub-GeV vector boson (A′) mediated production of dark matter (χ) in the fixed-target experiment, NA64, at the CERN SPS. The A′, called dark photon, can be generated in the reaction e-Z→e-ZA′ of 100 GeV electrons dumped against an active target followed by its prompt invisible decay A′→χχ. The experimental signature of this process would be an event with an isolated electron and large missing energy in the detector. From the analysis of the data sample collected in 2016 corresponding to 4.3×1010 electrons on target no evidence of such a process has been found. New stringent constraints on the A′ mixing strength with photons, 10-5 ϵ 10-2, for the A′ mass range mA′ 1 GeV are derived. For models considering scalar and fermionic thermal dark matter interacting with the visible sector through the vector portal the 90{\%} C.L. limits 10-11 y 10-6 on the dark-matter parameter y=ϵ2αD(mχmA′)4 are obtained for the dark coupling constant αD=0.5 and dark-matter masses 0.001 mχ 0.5 GeV. The lower limits αD 10-3 for pseudo-Dirac dark matter in the mass region mχ 0.05 GeV are more stringent than the corresponding bounds from beam dump experiments. The results are obtained by using exact tree level calculations of the A′ production cross sections, which turn out to be significantly smaller compared to the one obtained in the Weizs{\"a}cker-Williams approximation for the mass region mA′ 0.1 GeV.",
author = "{(The NA64 Collaboration)} and D. Banerjee and Burtsev, {V. E.} and Chumakov, {A. G.} and D. Cooke and P. Crivelli and E. Depero and Dermenev, {A. V.} and Donskov, {S. V.} and F. Dubinin and Dusaev, {R. R.} and S. Emmenegger and A. Fabich and Frolov, {V. N.} and A. Gardikiotis and Gerassimov, {S. G.} and Gninenko, {S. N.} and M. H{\"o}sgen and Karneyeu, {A. E.} and B. Ketzer and Kirpichnikov, {D. V.} and Kirsanov, {M. M.} and Konorov, {I. V.} and Kovalenko, {S. G.} and Kramarenko, {V. A.} and Kravchuk, {L. V.} and Krasnikov, {N. V.} and Kuleshov, {S. V.} and Lyubovitskij, {V. E.} and V. Lysan and Matveev, {V. A.} and Mikhailov, {Yu V.} and Peshekhonov, {D. V.} and Polyakov, {V. A.} and B. Radics and R. Rojas and A. Rubbia and Samoylenko, {V. D.} and Tikhomirov, {V. O.} and Tlisov, {D. A.} and Toropin, {A. N.} and Trifonov, {A. Yu} and Vasilishin, {B. I.} and {Vasquez Arenas}, G. and P. Ulloa",
year = "2018",
month = "4",
day = "1",
doi = "10.1103/PhysRevD.97.072002",
language = "English",
volume = "97",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "7",

}

TY - JOUR

T1 - Search for vector mediator of dark matter production in invisible decay mode

AU - (The NA64 Collaboration)

AU - Banerjee, D.

AU - Burtsev, V. E.

AU - Chumakov, A. G.

AU - Cooke, D.

AU - Crivelli, P.

AU - Depero, E.

AU - Dermenev, A. V.

AU - Donskov, S. V.

AU - Dubinin, F.

AU - Dusaev, R. R.

AU - Emmenegger, S.

AU - Fabich, A.

AU - Frolov, V. N.

AU - Gardikiotis, A.

AU - Gerassimov, S. G.

AU - Gninenko, S. N.

AU - Hösgen, M.

AU - Karneyeu, A. E.

AU - Ketzer, B.

AU - Kirpichnikov, D. V.

AU - Kirsanov, M. M.

AU - Konorov, I. V.

AU - Kovalenko, S. G.

AU - Kramarenko, V. A.

AU - Kravchuk, L. V.

AU - Krasnikov, N. V.

AU - Kuleshov, S. V.

AU - Lyubovitskij, V. E.

AU - Lysan, V.

AU - Matveev, V. A.

AU - Mikhailov, Yu V.

AU - Peshekhonov, D. V.

AU - Polyakov, V. A.

AU - Radics, B.

AU - Rojas, R.

AU - Rubbia, A.

AU - Samoylenko, V. D.

AU - Tikhomirov, V. O.

AU - Tlisov, D. A.

AU - Toropin, A. N.

AU - Trifonov, A. Yu

AU - Vasilishin, B. I.

AU - Vasquez Arenas, G.

AU - Ulloa, P.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - A search is performed for a new sub-GeV vector boson (A′) mediated production of dark matter (χ) in the fixed-target experiment, NA64, at the CERN SPS. The A′, called dark photon, can be generated in the reaction e-Z→e-ZA′ of 100 GeV electrons dumped against an active target followed by its prompt invisible decay A′→χχ. The experimental signature of this process would be an event with an isolated electron and large missing energy in the detector. From the analysis of the data sample collected in 2016 corresponding to 4.3×1010 electrons on target no evidence of such a process has been found. New stringent constraints on the A′ mixing strength with photons, 10-5 ϵ 10-2, for the A′ mass range mA′ 1 GeV are derived. For models considering scalar and fermionic thermal dark matter interacting with the visible sector through the vector portal the 90% C.L. limits 10-11 y 10-6 on the dark-matter parameter y=ϵ2αD(mχmA′)4 are obtained for the dark coupling constant αD=0.5 and dark-matter masses 0.001 mχ 0.5 GeV. The lower limits αD 10-3 for pseudo-Dirac dark matter in the mass region mχ 0.05 GeV are more stringent than the corresponding bounds from beam dump experiments. The results are obtained by using exact tree level calculations of the A′ production cross sections, which turn out to be significantly smaller compared to the one obtained in the Weizsäcker-Williams approximation for the mass region mA′ 0.1 GeV.

AB - A search is performed for a new sub-GeV vector boson (A′) mediated production of dark matter (χ) in the fixed-target experiment, NA64, at the CERN SPS. The A′, called dark photon, can be generated in the reaction e-Z→e-ZA′ of 100 GeV electrons dumped against an active target followed by its prompt invisible decay A′→χχ. The experimental signature of this process would be an event with an isolated electron and large missing energy in the detector. From the analysis of the data sample collected in 2016 corresponding to 4.3×1010 electrons on target no evidence of such a process has been found. New stringent constraints on the A′ mixing strength with photons, 10-5 ϵ 10-2, for the A′ mass range mA′ 1 GeV are derived. For models considering scalar and fermionic thermal dark matter interacting with the visible sector through the vector portal the 90% C.L. limits 10-11 y 10-6 on the dark-matter parameter y=ϵ2αD(mχmA′)4 are obtained for the dark coupling constant αD=0.5 and dark-matter masses 0.001 mχ 0.5 GeV. The lower limits αD 10-3 for pseudo-Dirac dark matter in the mass region mχ 0.05 GeV are more stringent than the corresponding bounds from beam dump experiments. The results are obtained by using exact tree level calculations of the A′ production cross sections, which turn out to be significantly smaller compared to the one obtained in the Weizsäcker-Williams approximation for the mass region mA′ 0.1 GeV.

UR - http://www.scopus.com/inward/record.url?scp=85046764709&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046764709&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.97.072002

DO - 10.1103/PhysRevD.97.072002

M3 - Article

AN - SCOPUS:85046764709

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 7

M1 - 072002

ER -