Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer
文献类型：期刊论文
| 作者 | TOTEM Collaboration; CMS Collaboration |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2018 |
| 期号 | 7页码:153 |
| 关键词 | Forward physics Hadron-Hadron scattering (experiments) Photon production proton-proton scattering |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP07(2018)153 |
| 文献子类 | Article |
| 英文摘要 | The process pp -> pl(+)l(-)p(()*()), with l(+)l(-) a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at root s = 13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p*, which is undetected. The measurement is based on an integrated luminosity of 9.4 fb(-1) collected during standard, high-luminosity LHC operation. A total of 12 mu(+)/mu(-) and 8 e(+)e(-) pairs with m(l(+)l(-)) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1.49 +/- 0.07 (stat) +/- 0.53 (syst) and 2.36 +/- 0.09 (stat) +/- 0.47(syst), respectively. This corresponds to an excess of more than five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged gamma gamma collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications. |
| WOS关键词 | LHC ; DETECTORS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000440090400002 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286167]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | TOTEM Collaboration,CMS Collaboration. Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer[J]. JOURNAL OF HIGH ENERGY PHYSICS,2018(7):153. |
| APA | TOTEM Collaboration,&CMS Collaboration.(2018).Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer.JOURNAL OF HIGH ENERGY PHYSICS(7),153. |
| MLA | TOTEM Collaboration,et al."Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer".JOURNAL OF HIGH ENERGY PHYSICS .7(2018):153. |
入库方式： OAI收割
来源：高能物理研究所
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