Luminosity-independent measurements of total, elastic and inelastic cross-sections at √ s = 7 TeV

0397511 - FZÚ 2014 RIV FR eng J - Článek v odborném periodiku
Antchev, G. - Aspell, P. - Atanassov, I. - Kašpar, Jan - Kopal, Josef - Kundrát, Vojtěch - Procházka, Jiří - Lokajíček, Miloš V. … celkem 78 autorů
Luminosity-independent measurements of total, elastic and inelastic cross-sections at √ s = 7 TeV.
EPL. Roč. 101, č. 2 (2013), "21004-p1"-"21002-p5". ISSN 0295-5075. E-ISSN 1286-4854
Grant CEP: GA MŠMT LA08015
Institucionální podpora: RVO:68378271
Klíčová slova: proton-proton elastic * inelastic and total cross-sections * LHC
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 2.269, rok: 2013

The TOTEM experiment at the LHC has performed the first luminosity-independent determination of the total proton-proton cross-section at $/sqrt{s} = 7$ TeV. This technique is based on the optical theorem and requires simultaneous measurements of the inelastic rate - accomplished with the forward charged-particle telescopes T1 and T2 in the range 3.1 <|η|<6.6 - and of the elastic rate by detecting the outcoming protons with Roman Pot detectors. The data presented here were collected in a dedicated run in 2011 with special beam optics (β*=90 m) and Roman Pots approaching the beam close enough to register elastic events with squared four-momentum transfers |t| as low as 0.005 GeV**2. The luminosity-independent results for the elastic, inelastic and total cross-sections are (25.1 $/pm$ 1.1) mb, (72.9 $/pm$ 1.5) mb and (98.0 $/pm$ 2.5), respectively.
Trvalý link: http://hdl.handle.net/11104/0225120