Measurement of small-angle antiproton-proton and proton-proton elastic scattering at the CERN intersecting storage rings

Amos, N.; Block, M. M.; Bobbink, G. J.; Botje, M.; Favart, D.; Leroy, C.; Linde, F.; Lipnik, P.; Matheys, J.P.; Miller, Donald H.; Potter, K.; Shukla, S.; Velde-Wilquet, C. Vander; Zucchelli, S.

doi:10.1016/0550-3213(85)90511-5

Cited by 153 publications

(89 citation statements)

References 56 publications

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“…Data were normalised at 900 GeV from an extrapolation by Amos el al. [121] and the result, σ 900 total = 65.3 ± 0.7 ± 1.5 mb, was found to be consistent with previous measurements. We show in Fig.…”

Section: The Ramping Run and Ua5 Measurementsupporting

confidence: 92%

“…A final analysis from the group from Northwestern, comprehensive of both pp andp p scattering in the full range of ISR energies is given in [121]. This analysis was published after the CERN Sp pS had already been operational for a couple of years and the rise of the total cross section had been confirmed.…”

Section: A Final Analysis Of Isr Resultsmentioning

confidence: 99%

“…In the following we use the notation of [121], where the slope parameter B is indicated by b. The method used for measuring σ total , ρ and b, is luminosity dependent and is based on measuring the differential elastic rate and then making a simultaneous fit of the elastic differential cross section in and around the Coulomb region, typically 0.5 × 10 −3 < |t| < 50 × 10 −3 GeV 2 .…”

Section: A Final Analysis Of Isr Resultsmentioning

confidence: 99%

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Introduction to the physics of the total cross section at LHC

Pancheri

Srivastava

2017

Eur. Phys. J. C

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This review describes the development of the physics of hadronic cross sections up to recent LHC results and cosmic ray experiments. We present here a comprehensive review -written with a historical perspective -about total cross sections from medium to the highest energies explored experimentally and studied through a variety of methods and theoretical models for over 60 years. We begin by recalling the analytic properties of the elastic amplitude and the theorems about the asymptotic behavior of the total cross section. A discussion of how proton-proton cross sections are extracted from cosmic rays at higher than accelerator energies and help the study of these asymptotic limits, is presented. This is followed by a description of the advent of particle colliders, through which high energies and unmatched experimental precisions have been attained. Thus the measured hadronic elastic and total cross sections have become crucial instruments to probe the so called soft part of QCD physics, where quarks and gluons are confined, and have led to test and refine Regge behavior and a number of diffractive models. As the c.m. energy increases, the total cross section also probes the transition into hard scattering describable with perturbative QCD, the so-called mini-jet region. Further tests are provided by cross section measurements of γ p, γ * p and γ * γ * for models based on vector meson dominance, scaling limits of virtual photons at high Q 2 and the BFKL formalism. Models interpolating from virtual to real photons are also tested.

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Section: The Ramping Run and Ua5 Measurementsupporting

confidence: 92%

Section: A Final Analysis Of Isr Resultsmentioning

confidence: 99%

Section: A Final Analysis Of Isr Resultsmentioning

confidence: 99%

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Introduction to the physics of the total cross section at LHC

Pancheri

Srivastava

2017

Eur. Phys. J. C

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“…Até 1985, alguns grupos experimentais do acelerador ISR do CERN (AMOS et al, 1985), utilizando-se de métodos convencionais, fizeram uma série de medidas desta grandeza para as colisões pp e p p no intervalo de energias …”

Section: Introductionunclassified

Algumas discussões adicionais sobre o método de determinação de p , a razão entre a parte real e a parte imaginária da amplitude de espalhamento hadrônico elástico na direção para frente, a altas energias

Pádua

2004

Semina: Tech. Ex.

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ResumoO método correto de determinação de ρ , a razão entre as partes real e imaginária da amplitude de espalhamento elástico na direção para frente, nas colisões hadrônicas a altas energias, permanece até hoje uma questão em aberto. Neste trabalho, rediscutimos este problema e propormos duas parametrizações alternativas para ajuste dos AbstractThe correct method of determination of ρ, the ratio between the real and imaginary part of the elastic scattering amplitude in the forward direction, in the hadronic collisions at high energy, remains as an is still considered an open subject up till now. In this work we come back to discuss this problem and present two alternative fits for adjustment of the experimental data of /dt dσ in the Coulomb -Hadronic Interference region are presented, consequently obtaining as well as the value of ρ . Our proposals were tested with the data obtained in the polemic experiment accomplished in CERN in 1986 by the UA4/1 collaboration for the p p collision at

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“…This fact was confirmed by a second experiment performed just before the demise of the ISR, when the availability of the CERN Antiproton Accumulator allowed a measurement of the real part of the antiproton-proton forward scattering amplitude. 44 The CERN-Louvain-la-Neuve-Northwestern-Utrecht Collaboration used the apparatus of the CERN-Rome Collaboration and inherited its techniques: I remember Jheroen Dorenbosch and myself passing to Martin Bloch the codes that we had developed over the years.…”

Section: Second-generation Experimentsmentioning

confidence: 99%

An ISR Discovery: The Rise of the Proton–Proton Cross-Section

Amaldi

2015

Advanced Series on Directions in High Energy Physics

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The Intersecting Storage Rings (ISR) were the first hadron collider ever built, providing proton-proton collisions at centre-of-mass energies as high as 62 GeV, almost five times larger than any previous accelerator. When in 1971 the ISR began operation the Reggepole approach dominated and the proton-proton total cross-section was expected to have already reached a finite asymptotic value. However, ISR experiments found that the cross-section was rising by 10% between 22 and 62 GeV, while the interaction radius was increasing by 5%, a trend that continues up to the hundred times larger energies available at the Large Hadron Collider. In order to accurately measure the total and elastic cross-sections, new experimental methods -uniquely adapted to the environment of a hadron collider -had to be developed; they are described in the central part of this paper, which closes with a review of the data obtained at the LHC since they put in a wider perspective the forty years old ISR results.

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Measurement of small-angle antiproton-proton and proton-proton elastic scattering at the CERN intersecting storage rings

Cited by 153 publications

References 56 publications

Introduction to the physics of the total cross section at LHC

Introduction to the physics of the total cross section at LHC

Algumas discussões adicionais sobre o método de determinação de p , a razão entre a parte real e a parte imaginária da amplitude de espalhamento hadrônico elástico na direção para frente, a altas energias

An ISR Discovery: The Rise of the Proton–Proton Cross-Section

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