| 000 | 04141nlm1a2200445 4500 | ||
|---|---|---|---|
| 001 | 660075 | ||
| 005 | 20231030041652.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\28997 | ||
| 090 | _a660075 | ||
| 100 | _a20190422a2018 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aUS | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aSearch for vector mediator of dark matter production in invisible decay mode _fD. Banerjee [et al.] |
|
| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 320 | _a[References: 76 tit.] | ||
| 330 | _aA 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′→χ¯χ. 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≲10−6on the dark-matter parameter y=ε2αD(mχmA′)4 are obtained for the dark coupling constant αD=0.5and 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 | ||
| 461 |
_tPhysical Review D _ocovering particles, fields, gravitation, and cosmology |
||
| 463 |
_tVol. 97, iss. 7 _v[072002, 22 p.] _d2018 |
||
| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aнелептонные распады | |
| 610 | 1 | _aвекторные методы | |
| 610 | 1 | _aмедиаторы | |
| 701 | 1 |
_aBanerjee _bD. |
|
| 701 | 1 |
_aCrivelli _bP. _gPaolo |
|
| 701 | 1 |
_aBurtsev _bV. E. _cmathematician _cSenior Lecturer of Tomsk Polytechnic University _f1991- _gVitaly Evgenjevich _2stltpush _3(RuTPU)RU\TPU\pers\38282 |
|
| 701 | 1 |
_aChumakov _bA. G. _cphysicist _claboratory assistant-researcher of Tomsk Polytechnic University _f1992- _gAleksandr Grigorjevich _2stltpush _3(RuTPU)RU\TPU\pers\41079 |
|
| 701 | 1 |
_aDusaev _bR. R. _cspecialist in the field of nuclear physics _cEngineer of Tomsk Polytechnic University _f1988- _gRenat Ramilyevich _2stltpush _3(RuTPU)RU\TPU\pers\30972 |
|
| 701 | 1 |
_aLyubovitskiy (Lyubovitskij) _bV. E. _cphysicist _cProfessor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) _f1963- _gValery Efimovich _2stltpush _3(RuTPU)RU\TPU\pers\33385 |
|
| 701 | 1 |
_aTrifonov _bA. Yu. _cphysicist, mathematician _cProfessor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences _f1963- _gAndrey Yurievich _2stltpush _3(RuTPU)RU\TPU\pers\30754 |
|
| 701 | 1 |
_aVasilishin _bB. I. _cengineer-physicist _claboratory researcher at Tomsk Polytechnic University _f1990- _gBogdan Ivanovich _2stltpush _3(RuTPU)RU\TPU\pers\37572 |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИсследовательская школа физики высокоэнергетических процессов _c(2017- ) _h8118 _2stltpush _3(RuTPU)RU\TPU\col\23551 |
| 801 | 2 |
_aRU _b63413507 _c20220207 _gRCR |
|
| 856 | 4 | _uhttp://earchive.tpu.ru/handle/11683/57565 | |
| 856 | 4 | _uhttps://doi.org/10.1103/PhysRevD.97.072002 | |
| 942 | _cCF | ||