期刊
EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 10, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-019-7346-7
关键词
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资金
- NSF (US)
- Magnus Ehrnrooth Foundation (Finland)
- Waldemar von Frenckell Foundation (Finland)
- Academy of Finland
- Finnish Academy of Science and Letters (The Vilho Yrjo and Kalle Vaisala Fund)
- Circles of Knowledge Club (Hungary)
- OTKA NK [101438]
- Nylands nation vid Helsingfors universitet (Finland)
- MSMT CR (Czech Republic)
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
- New National Excellence Program of the Hungarian Ministry of Human Capacities [NKP-17-4]
- Polish Ministry of Science and Higher Education [MNiSW DIR/WK/2017/07-01]
- [EFOP-3.6.1-16-2016-00001]
The TOTEM collaboration has measured the velastic proton-proton differential cross section d sigma/dt at root s = 13 TeV LHC energy using dedicated beta* = 90 m beam optics. The Roman Pot detectors were inserted to 10s distance from the LHC beam, which allowed the measurement of the range [0.04 GeV2; 4 GeV2] in four-momentum transfer squared vertical bar t vertical bar. The efficient data acquisition allowed to collect about 10(9) elastic events to precisely measure the differential cross-section including the diffractive minimum (dip), the subsequent maximum (bump) and the large-vertical bar t vertical bar tail. The average nuclear slope has been found to be B = (20.40 +/- 0.002(stat) +/- 0.01(syst)) GeV-2 in the vertical bar t vertical bar-range 0.04-0.2 GeV2. The dip position is vertical bar t(dip)vertical bar = (0.47 +/- 0.004(stat)+/- 0.01(syst)) GeV2. The differential cross section ratio at the bump vs. at the dip R = 1.77 +/- 0.01(stat) has been measured with high precision. The series of TOTEM elastic pp measurements show that the dip is a permanent feature of the pp differential cross-section at the TeV scale.
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