download0 view111
twitter facebook

공공누리This item is licensed Korea Open Government License

Title
Measurement of inelastic, single- and double-diffraction cross sections in proton–proton collisions at the LHC with ALICE
Author(s)
ALICE Collaboration안설아장행진
Publication Year
2013-03-13
Abstract
Measurements of cross sections of inelastic and diffractive processes in proton–proton collisions at LHC energies were carried out with the ALICE detector. The fractions of diffractive processes in inelastic collisions were determined from a study of gaps in charged particle pseudorapidity distributions: for single diffraction (diffractive mass M X below 200 GeV/c 2) σSD/σINEL=0.21±0.03,0.20+0.07−0.08 , and 0.20+0.04−0.07 , respectively at centre-of-mass energies s√=0.9,2.76, and 7 TeV: for double diffraction (for a pseudorapidity gap Δη above 3) σ DD/σ INEL=0.11±0.03,0.12±0.05, and 0.12+0.05−0.04 , respectively at s√=0.9,2.76, and 7 TeV. To measure the inelastic cross section, beam properties were determined with van der Meer scans, and, using a simulation of diffraction adjusted to data, the following values were obtained: σINEL=62.8+2.4−4.0(model)±1.2(lumi) mb at s√=2.76 TeV and 73.2+2.0−4.6(model)±2.6(lumi) mb at s√=7 TeV . The single- and double-diffractive cross sections were calculated combining relative rates of diffraction with inelastic cross sections. The results are compared to previous measurements at proton–antiproton and proton–proton colliders at lower energies, to measurements by other experiments at the LHC, and to theoretical models.
Keyword
inelastic; single-and double-diffraction cross sections; proton-proton collision; LHC; ALICE
Journal Title
European Physical Journal C
ISSN
1434-6044
DOI
10.1140/epjc/s10052-013-2456-0
Files in This Item:
There are no files associated with this item.
Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14200
Export
RIS (EndNote)
XLS (Excel)
XML

Browse