Measurement of the tt¯tt¯ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at s√=13TeV; European Physical Journal C; Vol. 79, iss. 5
| Parent link: | European Physical Journal C Vol. 79, iss. 5.— 2019.— [368, 36 p.] |
|---|---|
| Müşterek Yazar: | |
| Diğer Yazarlar: | , , , , , , , |
| Özet: | Title screen A measurement of the top quark-antiquark pair production cross section σtt¯σtt¯ in proton-proton collisions at a centre-of-mass energy of 13TeVTeV is presented. The data correspond to an integrated luminosity of 35.9fb−135.9fb−1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (ee ±± μμ ∓∓, μ+μ−μ+μ−, e+e−e+e−) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMCt=172.5GeVmtMC=172.5GeV the fit yields a measured cross section σtt¯=803±2(stat)±25(syst)±20(lumi)pbσtt¯=803±2(stat)±25(syst)±20(lumi)pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the POWHEG simulation is performed. The measured value of mMCt=172.33±0.14(stat)+0.66−0.72(syst)GeVmtMC=172.33±0.14(stat)−0.72+0.66(syst)GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions. |
| Dil: | İngilizce |
| Baskı/Yayın Bilgisi: |
2019
|
| Konular: | |
| Online Erişim: | https://doi.org/10.1140/epjc/s10052-019-6863-8 |
| Materyal Türü: | Elektronik Kitap Bölümü |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663855 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 663855 | ||
| 005 | 20250527115755.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\35025 | ||
| 090 | |a 663855 | ||
| 100 | |a 20210315d2019 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Measurement of the tt¯tt¯ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at s√=13TeV |f A. M. Sirunyan, A. R. Tumasyan, W. Adam [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 85 tit.] | ||
| 330 | |a A measurement of the top quark-antiquark pair production cross section σtt¯σtt¯ in proton-proton collisions at a centre-of-mass energy of 13TeVTeV is presented. The data correspond to an integrated luminosity of 35.9fb−135.9fb−1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (ee ±± μμ ∓∓, μ+μ−μ+μ−, e+e−e+e−) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMCt=172.5GeVmtMC=172.5GeV the fit yields a measured cross section σtt¯=803±2(stat)±25(syst)±20(lumi)pbσtt¯=803±2(stat)±25(syst)±20(lumi)pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the POWHEG simulation is performed. The measured value of mMCt=172.33±0.14(stat)+0.66−0.72(syst)GeVmtMC=172.33±0.14(stat)−0.72+0.66(syst)GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions. | ||
| 461 | |t European Physical Journal C | ||
| 463 | |t Vol. 79, iss. 5 |v [368, 36 p.] |d 2019 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a протон-протонные соударения | |
| 701 | 1 | |a Sirunyan |b A. M. | |
| 701 | 1 | |a Tumasyan |b A. R. | |
| 701 | 1 | |a Adam |b W. |g Wolfgang | |
| 701 | 1 | |a Ambrogi |b F. |g Federico | |
| 701 | 1 | |a Asilar |b E. |g Ece | |
| 701 | 1 | |a Bergauer |b T. |g Thomas | |
| 701 | 1 | |a Babaev |b A. A. |c physicist |c engineer-issledovatelskogo Polytechnic University, candidate of physical and mathematical Sciences |f 1981- |g Anton Anatoljevich |3 (RuTPU)RU\TPU\pers\35154 |9 18420 | |
| 701 | 1 | |a Okhotnikov |b V. V. |c physicist |c engineer of Tomsk Polytechnic University |f 1992- |g Vitaly Vladimirovich |3 (RuTPU)RU\TPU\pers\36453 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа физики высокоэнергетических процессов |c (2017- ) |3 (RuTPU)RU\TPU\col\23551 |
| 801 | 2 | |a RU |b 63413507 |c 20210315 |g RCR | |
| 850 | |a 63413507 | ||
| 856 | 4 | |u https://doi.org/10.1140/epjc/s10052-019-6863-8 | |
| 942 | |c CF | ||