| 000 | 02518nlm1a2200361 4500 | ||
|---|---|---|---|
| 001 | 664600 | ||
| 005 | 20231030041935.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\35784 | ||
| 090 | _a664600 | ||
| 100 | _a20210429a2020 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _aarnn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aMeasurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead _fV. Sokhoyan, S. N. Prakhov, A. I. Fiks (Fix) [et al.] |
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| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 320 | _a[References.: 58 tit.] | ||
| 330 | _aThe first direct, model-independent measurement is presented of the modulus of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |η|Vtb, |η|Vtd, and |η|Vts, in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. Processes directly sensitive to these matrix elements are considered at both the production and decay vertices of the top quark. In the standard model hypothesis of CKM unitarity, a lower limit of |η|Vtb>0.970 is measured at the 95% confidence level. Several theories beyond the standard model are considered, and by releasing all constraints among the involved parameters, the values |η|Vtb=0.988±0.024, and |η|Vtd2+|η|Vts2=0.06±0.06, where the uncertainties include both statistical and systematic components, are measured. | ||
| 461 | _tPhysics Letters B | ||
| 463 |
_tVol. 802 _v[135243, 8 p.] _d2020 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aфоторождение | |
| 701 | 1 |
_aSokhoyan _bV. |
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| 701 | 1 |
_aPrakhov _bS. N. |
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| 701 | 1 |
_aFiks (Fix) _bA. I. _cmathematician _cProfessor of Tomsk Polytechnic University, doctor of physico-mathematical Sciences _f1968- _gAlexander Ivanovich _2stltpush _3(RuTPU)RU\TPU\pers\33830 |
|
| 701 | 1 |
_aAbt _bS. |
|
| 701 | 1 |
_aAchenbach _bP. _gPatrick |
|
| 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 _c20210429 _gRCR |
|
| 856 | 4 | _uhttps://doi.org/10.1016/j.physletb.2020.135243 | |
| 942 | _cCF | ||