Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE

B. Abelev; J. Adam; D. Adamová; Ian Bearden; Ante Bilandzic; Hans Bøggild; Christian Holm Christensen; Hans Hjersing Dalsgaard; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Alexander Colliander Hansen; Børge Svane Nielsen; Casper Nygaard; Carsten Søgaard; Valentina Zaccolo

doi:10.1140/epjc/s10052-013-2456-0

Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE

B. Abelev, J. Adam, D. Adamová, Ian Bearden, Ante Bilandzic, Hans Bøggild, Christian Holm Christensen, Hans Hjersing Dalsgaard, Jens Jørgen Gaardhøje, Kristjan Herlache Gulbrandsen, Alexander Colliander Hansen, Børge Svane Nielsen, Casper Nygaard, Carsten Søgaard, Valentina Zaccolo

Eksperimentel subatomar fysik

155 Citationer (Scopus)

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<200 GeV/c ²) σ_SD/σ_INEL = 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 7TeV; for double diffraction (for a pseudorapidity gap Δη>3) σ _DD/σ _INEL=0.11±0.03,0.12±0.05, and 0.20^+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: σ_INEL = 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.

Originalsprog	Engelsk
Artikelnummer	2456
Tidsskrift	European Physical Journal C
Vol/bind	73
Udgave nummer	6
Antal sider	29
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-013-2456-0
Status	Udgivet - 8 jun. 2013

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10.1140/epjc/s10052-013-2456-0

Citationsformater

Abelev, B., Adam, J., Adamová, D., Bearden, I., Bilandzic, A., Bøggild, H., Christensen, C. H., Dalsgaard, H. H., Gaardhøje, J. J., Gulbrandsen, K. H., Hansen, A. C., Nielsen, B. S., Nygaard, C., Søgaard, C., & Zaccolo, V. (2013). Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE. European Physical Journal C, 73(6), [2456]. https://doi.org/10.1140/epjc/s10052-013-2456-0

Abelev, B, Adam, J, Adamová, D, Bearden, I, Bilandzic, A, Bøggild, H , Christensen, CH, Dalsgaard, HH, Gaardhøje, JJ , Gulbrandsen, KH, Hansen, AC, Nielsen, BS, Nygaard, C, Søgaard, C & Zaccolo, V 2013, 'Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE', European Physical Journal C, bind 73, nr. 6, 2456. https://doi.org/10.1140/epjc/s10052-013-2456-0

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title = "Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE",

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<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 7TeV; for double diffraction (for a pseudorapidity gap Δη>3) σ DD/σ INEL=0.11±0.03,0.12±0.05, and 0.20+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.",

author = "B. Abelev and J. Adam and D. Adamov{\'a} and Ian Bearden and Ante Bilandzic and Hans B{\o}ggild and Christensen, {Christian Holm} and Dalsgaard, {Hans Hjersing} and Gaardh{\o}je, {Jens J{\o}rgen} and Gulbrandsen, {Kristjan Herlache} and Hansen, {Alexander Colliander} and Nielsen, {B{\o}rge Svane} and Casper Nygaard and Carsten S{\o}gaard and Valentina Zaccolo",

year = "2013",

month = jun,

day = "8",

doi = "10.1140/epjc/s10052-013-2456-0",

language = "English",

volume = "73",

journal = "The European Physical Journal C: Particles and Fields",

issn = "1434-6044",

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TY - JOUR

T1 - Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Bearden, Ian

AU - Bilandzic, Ante

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Hansen, Alexander Colliander

AU - Nielsen, Børge Svane

AU - Nygaard, Casper

AU - Søgaard, Carsten

AU - Zaccolo, Valentina

PY - 2013/6/8

Y1 - 2013/6/8

N2 - 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<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 7TeV; for double diffraction (for a pseudorapidity gap Δη>3) σ DD/σ INEL=0.11±0.03,0.12±0.05, and 0.20+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.

AB - 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<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 7TeV; for double diffraction (for a pseudorapidity gap Δη>3) σ DD/σ INEL=0.11±0.03,0.12±0.05, and 0.20+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.

U2 - 10.1140/epjc/s10052-013-2456-0

DO - 10.1140/epjc/s10052-013-2456-0

M3 - Journal article

C2 - 25814861

SN - 1434-6044

VL - 73

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 6

M1 - 2456

ER -

Measurement of inelastic, single- and double-diffraction cross sections in proton--proton collisions at the LHC with ALICE

Abstract

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