Measurement of the ηc(1S) production cross-section in pp collisions at √s =13 TeV; The European Physical Journal C; Vol. 80, iss. 3
| Parent link: | The European Physical Journal C Vol. 80, iss. 3.— 2020.— [191, 18 p.] |
|---|---|
| Corporate Authors: | , |
| Other Authors: | , , , , , , |
| Summary: | Title screen Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the ηc(1S) state in proton-proton collisions at a centre-of-mass energy of √s=13 TeV is studied in the rapidity range 2.0<y<4.5 and in the transverse momentum range 6.5<pT<14.0GeV. The cross-section for prompt production of ηc(1S) mesons relative to that of the J/ψJ/ψ meson is measured using the pp p¯¯¯p¯ decay mode and is found to be σηc(1S)/σJ/ψ=1.69±0.15±0.10±0.18. The quoted uncertainties are, in order, statistical, systematic and due to uncertainties on the branching fractions of the J/ψ→pp¯¯¯ and ηc→pp¯¯¯ decays. The prompt ηc(1S) production cross-section is determined to be σηc(1S)=1.26±0.11±0.08±0.14μb, where the last uncertainty includes that on the J/ψJ/ψ meson cross-section. The ratio of the branching fractions of bb-hadron decays to the ηc(1S)ηc(1S) and J/ψJ/ψ states is measured to be Bb→ηcX/Bb→J/ψX=0.48±0.03±0.03±0.05, where the last uncertainty is due to those on the branching fractions of the J/ψ→pp¯¯¯J/ψ→pp¯ and ηc→pp¯¯¯ηc→pp¯ decays. The difference between the J/ψJ/ψ and ηc(1S)ηc(1S) masses is also determined to be 113.0±0.7±0.1MeV, which is the most precise single measurement of this quantity to date. |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://doi.org/10.1140/epjc/s10052-020-7733-0 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664727 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 664727 | ||
| 005 | 20260807071628.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\35911 | ||
| 035 | |a RU\TPU\network\35909 | ||
| 090 | |a 664727 | ||
| 100 | |a 20210514d2020 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 ηc(1S) production cross-section in pp collisions at √s =13 TeV |f R. Aaij, C. B. Beteta, T. Ackernley [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 54 tit.] | ||
| 330 | |a Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the ηc(1S) state in proton-proton collisions at a centre-of-mass energy of √s=13 TeV is studied in the rapidity range 2.0<y<4.5 and in the transverse momentum range 6.5<pT<14.0GeV. The cross-section for prompt production of ηc(1S) mesons relative to that of the J/ψJ/ψ meson is measured using the pp p¯¯¯p¯ decay mode and is found to be σηc(1S)/σJ/ψ=1.69±0.15±0.10±0.18. The quoted uncertainties are, in order, statistical, systematic and due to uncertainties on the branching fractions of the J/ψ→pp¯¯¯ and ηc→pp¯¯¯ decays. The prompt ηc(1S) production cross-section is determined to be σηc(1S)=1.26±0.11±0.08±0.14μb, where the last uncertainty includes that on the J/ψJ/ψ meson cross-section. The ratio of the branching fractions of bb-hadron decays to the ηc(1S)ηc(1S) and J/ψJ/ψ states is measured to be Bb→ηcX/Bb→J/ψX=0.48±0.03±0.03±0.05, where the last uncertainty is due to those on the branching fractions of the J/ψ→pp¯¯¯J/ψ→pp¯ and ηc→pp¯¯¯ηc→pp¯ decays. The difference between the J/ψJ/ψ and ηc(1S)ηc(1S) masses is also determined to be 113.0±0.7±0.1MeV, which is the most precise single measurement of this quantity to date. | ||
| 461 | |t The European Physical Journal C | ||
| 463 | |t Vol. 80, iss. 3 |v [191, 18 p.] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 1 | |a Aaij |b R. |g Roel | |
| 701 | 1 | |a Beteta |b C. B. |g Carlos Abellan | |
| 701 | 1 | |a Ackernley |b T. | |
| 701 | 1 | |a Adeva |b B. |g Bernardo | |
| 701 | 1 | |a Eydelman |b S. I. |g Semen Isaakovich | |
| 701 | 1 | |a Kharisova |b A. E. |c nuclear technology specialist |c engineer of Tomsk Polytechnic University |f 1994- |g Anastasiya Evgenjevna |3 (RuTPU)RU\TPU\pers\46775 | |
| 701 | 1 | |a Panshin |b G. L. |c specialist in the field of informatics and computer technology |c Senior Lecturer at Tomsk Polytechnic University |f 1987- |g Gennady Leonidovich |3 (RuTPU)RU\TPU\pers\40978 |9 21367 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа физики высокоэнергетических процессов |c (2017- ) |3 (RuTPU)RU\TPU\col\23551 |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа информационных технологий и робототехники |c 2017- |x TPU |7 ca |8 rus |9 28330 |
| 801 | 2 | |a RU |b 63413507 |c 20210514 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1140/epjc/s10052-020-7733-0 | |
| 942 | |c CF | ||