Measurement of proton-proton elastic scattering and total cross-section at √s=7 TeV

被引：161

作者：

Antchev, G.

Aspell, P. ^{[14
]}

Atanassov, I. ^{[14
]}

Avati, V. ^{[14
]}

Baechler, J. ^{[14
]}

Berardi, V. ^{[7
,8
]}

Berretti, M. ^{[12
,13
]}

Bossini, E. ^{[12
,13
]}

Bozzo, M. ^{[9
,10
]}

Brogi, P. ^{[12
,13
]}

Brucken, E. ^{[4
,5
]}

Buzzo, A. ^{[9
]}

Cafagna, F. S. ^{[7
]}

Calicchio, M. ^{[7
,8
]}

Catanesi, M. G. ^{[7
]}

Covault, C. ^{[15
]}

Csanad, M. ^{[6
]}

Csoergo, T. ^{[6
]}

Deile, M. ^{[14
]}

Eggert, K. ^{[15
]}

Eremin, V.

Ferretti, R. ^{[9
,10
]}

Ferro, F. ^{[9
]}

Fiergolski, A.

Garcia, F. ^{[4
]}

Giani, S. ^{[14
]}

Greco, V. ^{[12
,13
,14
]}

Grzanka, L. ^{[14
]}

Heino, J. ^{[4
]}

Hilden, T. ^{[4
,5
]}

Intonti, R. A. ^{[7
]}

Kaspar, J. ^{[1
,14
]}

Kopal, J. ^{[1
,14
]}

Kundrat, V. ^{[1
]}

Kurvinen, K. ^{[4
]}

Lami, S. ^{[11
]}

Latino, G. ^{[12
,13
]}

Lauhakangas, R. ^{[4
]}

Leszko, T.

Lippmaa, E. ^{[3
]}

Lokajicek, M. ^{[1
]}

Lo Vetere, M. ^{[9
,10
]}

Rodriguez, F. Lucas ^{[14
]}

Macri, M. ^{[9
]}

Maki, T. ^{[4
]}

Mercadante, A. ^{[7
,8
]}

Minafra, N. ^{[14
]}

Minutoli, S. ^{[9
]}

Nemes, F. ^{[6
]}

Niewiadomski, H. ^{[14
]}

机构：

[1] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[2] Czech Tech Univ, CR-16635 Prague, Czech Republic

[3] NICPB, Tallinn, Estonia

[4] Helsinki Inst Phys, Helsinki, Finland

[5] Univ Helsinki, Dept Phys, Helsinki, Finland

[6] RMKI, MTA Wigner Res Ctr, Budapest, Hungary

[7] INFN Sez Bari, Bari, Italy

[8] Dipartimento Interateneo Fis Bari, Bari, Italy

[9] Sez INFN Genova, Genoa, Italy

[10] Univ Genoa, Genoa, Italy

[11] INFN Sez Pisa, Pisa, Italy

[12] Univ Siena, I-53100 Siena, Italy

[13] Grp Collegato INFN Siena, Siena, Italy

[14] CERN, Geneva, Switzerland

[15] Case Western Reserve Univ, Deptartment Phys, Cleveland, OH 44106 USA

[16] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

EPL | 2013年 / 101卷 / 02期

基金：

芬兰科学院;

关键词：

D O I：

10.1209/0295-5075/101/21002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

At the LHC energy of root s = 7TeV, under various beam and background conditions, luminosities, and Roman Pot positions, TOTEM has measured the differential cross-section for proton-proton elastic scattering as a function of the four-momentum transfer squared t. The results of the different analyses are in excellent agreement demonstrating no sizeable dependence on the beam conditions. Due to the very close approach of the Roman Pot detectors to the beam center (approximate to 5 sigma(beam)) in a dedicated run with beta* = 90 m, vertical bar t vertical bar-values down to 5.10(-3) GeV2 were reached. The exponential slope of the differential elastic cross-section in this newly explored vertical bar t vertical bar-region remained unchanged and thus an exponential fit with only one constant B = (19.9+/-0.3) GeV-2 over the large vertical bar t vertical bar-range from 0.005 to 0.2 GeV2 describes the differential distribution well. The high precision of the measurement and the large fit range lead to an error on the slope parameter B which is remarkably small compared to previous experiments. It allows a precise extrapolation over the non-visible cross-section (only 9%) to t = 0. With the luminosity from CMS, the elastic cross-section was determined to be (25.4+/-1.1) mb, and using in addition the optical theorem, the total pp cross-section was derived to be (98.6 +/- 2.2) mb. For model comparisons the t-distributions are tabulated including the large vertical bar t vertical bar-range of the previous measurement (TOTEM Collaboration (ANTCHEV G. et al.), EPL, 95 (2011) 41001).

引用

页数：7

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