| 000 | 03813nlm1a2200457 4500 | ||
|---|---|---|---|
| 001 | 662458 | ||
| 005 | 20231030041821.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\33613 | ||
| 090 | _a662458 | ||
| 100 | _a20200820a2019 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _aarnn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aSearch for an Lμ − Lτ gauge boson using Z → 4μ events in proton-proton collisions at vs=13 TeV _fА. М. Sirunyan, A. R. Tumasyan, W. Adam [et al.] |
|
| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 320 | _a[References.: 65 tit.] | ||
| 330 | _aA search for a narrow Z′ gauge boson with a mass between 5 and 70 GeV resulting from an Lμ−Lτ U(1) local gauge symmetry is reported. Theories that predict such a particle have been proposed as an explanation of various experimental discrepancies, including the lack of a dark matter signal in direct-detection experiments, tension in the measurement of the anomalous magnetic moment of the muon, and reports of possible lepton flavor universality violation in B meson decays. A data sample of proton-proton collisions at a center-of-mass energy of 13 TeV is used, corresponding to an integrated luminosity of 77.3 fb−1 recorded in 2016 and 2017 by the CMS detector at the LHC. Events containing four muons with an invariant mass near the standard model Z boson mass are analyzed, and the selection is further optimized to be sensitive to the events that may contain Z→Z′μμ→4μ decays. The event yields are consistent with the standard model predictions. Upper limits of 10−8-10−7 at 95% confidence level are set on the product of branching fractions B(Z→Z′μμ)B(Z′→μμ), depending on the Z′ mass, which excludes a Z′ boson coupling strength to muons above 0.004-0.3. These are the first dedicated limits on Lμ−Lτ models at the LHC and result in a significant increase in the excluded model parameter space. The results of this search may also be used to constrain the coupling strength of any light Z′ gauge boson to muons. | ||
| 461 | _tPhysics Letters B | ||
| 463 |
_tVol. 792 _v[P. 345-368] _d2019 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aCMS | |
| 610 | 1 | _aphysics | |
| 610 | 1 | _aZprime | |
| 610 | 1 | _aMuons | |
| 610 | 1 | _aфизика | |
| 701 | 1 |
_aSirunyan _bА. М. |
|
| 701 | 1 |
_aTumasyan _bA. R. |
|
| 701 | 1 |
_aAdam _bW. _gWolfgang |
|
| 701 | 1 |
_aAmbrogi _bF. _gFederico |
|
| 701 | 1 |
_aAsilar _bE. _gEce |
|
| 701 | 1 |
_aBergauer _bT. _gThomas |
|
| 701 | 1 |
_aBabaev _bA. A. _cphysicist _cengineer-issledovatelskogo Polytechnic University, candidate of physical and mathematical Sciences _f1981- _gAnton Anatoljevich _2stltpush _3(RuTPU)RU\TPU\pers\35154 |
|
| 701 | 1 |
_aOkhotnikov _bV. V. _cphysicist _cengineer of Tomsk Polytechnic University _f1992- _gVitaly Vladimirovich _2stltpush _3(RuTPU)RU\TPU\pers\36453 |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИсследовательская школа физики высокоэнергетических процессов _c(2017- ) _h8118 _2stltpush _3(RuTPU)RU\TPU\col\23551 |
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИнженерная школа новых производственных технологий _bНаучно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий" _h7882 _2stltpush _3(RuTPU)RU\TPU\col\23502 |
| 801 | 2 |
_aRU _b63413507 _c20211210 _gRCR |
|
| 856 | 4 | _uhttps://doi.org/10.1016/j.physletb.2019.01.072 | |
| 942 | _cCF | ||