Diffraction Dissociation of High-Energy Protons on Hydrogen and Deuterium Targets

Akimov, Yu.K.; Bartenev, V.D.; Cool, R. L.; Goulianos, K.; Gross, D.; Jenkins, E. W.; Malamud, E.; Markov, P.K.; Mukhin, S. V.; Nitz, D.; Olsen, S. L.; Sandacz, A.; Segler, S.; Sticker, H.; Yamada, R.

doi:10.1103/physrevlett.39.1432

Cited by 22 publications

(18 citation statements)

References 22 publications

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“…where p L denotes the longitudinal momentum component in the cms. Defining a range of beam momenta from 100 to about 400 GeV/c as SPS/Fermilab energy range, quite a few experiments have published inclusive particle yields [2][3][4][5][6][7][8][9][10]. The corresponding data coverage of the p T /x F plane is shown in Fig.…”

Section: The Experimental Situationmentioning

confidence: 99%

“…20 as a function of x F . Figure 21: Invariant cross section as function of p T at fixed x F taken from [3][4][5][6][7][8][9] and NA49. The full lines represent the data interpolation, the dashed lines the exponential parametrization [8] The internal consistency of the data sets used and their compatibility with the interpolation scheme as well as with the extrapolation to very low p T is presented in Fig.…”

Section: Interpolation Schemementioning

confidence: 99%

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Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum

et al. 2009

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New data on the production of protons, antiprotons and neutrons in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The charged baryons are identified by energy loss measurement in a large TPC tracking system. Neutrons are detected in a forward hadronic calorimeter. Inclusive invariant cross sections are obtained in intervals from 0 to 1.9 GeV/c (0 to 1.5 GeV/c) in transverse momentum and from −0.05 to 0.95 (−0.05 to 0.4) in Feynman x for protons (anti-protons), respectively. p T integrated neutron cross sections are given in the interval from 0.1 to 0.9 in Feynman x. The data are compared to a wide a

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Section: The Experimental Situationmentioning

confidence: 99%

Section: Interpolation Schemementioning

confidence: 99%

Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum

et al. 2009

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“…Thus, a plot of the differential cross section multiplied by s 1−2α(t) vs. s ′ should be independent of s. Figures 34(a-d) show this quantity from three fixed-target experiments at Fermilab [25,27,26], plotted vs. s ′ (s ′ = ξs) in 4 different t-bins; only data with s ′ > 3 GeV 2 and ξ < 0.03 are plotted, in order to avoid resolution smearing on the low side, and background contributions on the high side. In each case, there are data at several different s-values.…”

Section: Breakdown Of the Triple-regge Formula In The Resonance Regionmentioning

confidence: 99%

“…The curves correspond to Fit "A" in Table 7 evaluated at ξ = 0.035. [26,27]; (c,d) [25]. Smaller s ′ -values are not shown in order to avoid distortions due to resolution.…”

Section: Pmentioning

confidence: 99%

Measurements of single diffraction at √s = 630 GeV; Evidence for a non-linear α(t) of the pomeron

et al. 1998

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We report measurements of the inclusive differential cross section for the singlediffractive reactions: p i +p → p f + X and p +p i → X +p f at √ s = 630 GeV, in the momentum transfer range, 0.8 < −t < 2.0 GeV 2 and final state Feynmanx p > 0.90. Based on the assumption of factorization, several new features of the Pomeron Flux Factor are determined from simultaneous fits to our UA8 data and lower energy data from the CHLM collaboration at the CERN-Intersecting Storage Rings.Prominent among these is that the effective Pomeron Regge trajectory requires a term quadratic in t, with coefficient, α ′′ = 0.079±0.012 GeV −4 . We also show that the data require a Pomeron-proton cross section that first decreases with increasing diffractive mass (corresponding to the PPR term in the triple-Regge expansion) and then increases at larger mass (the PPP term), similar to real particle total cross sections. We measure the product, Kσ 0 = 0.72 ± 0.10 mb GeV −2 , where K is the normalization constant of the Pomeron Flux Factor in the proton and σ 0 is the scale constant in the Pomeron-proton total cross section. Finally, we report the occurence of "beam jets" in the Pomeron direction in the rest frame of the diffractive system.

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“…The t distribution of single diffraction is well fitted by an exponential distribution down to the smallest measured values, ! t =0.015 G~v -, [36]. This requires a in Eq.…”

Section: A Modified Regge Descriptionmentioning

confidence: 99%

Hadronic diffractive cross sections and the rise of the total cross section

1994

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A model for high-energy hadronic cross sections is proposed. It is based on Regge theory and perturbative QCD, and includes soft and hard mechanisms as well as diffractive processes. The validity range of Regge-pole theory in the description of total, elastic, single-, and double-diffractive cross sections is investigated and inconsistencies found already at CERN LHC and/or SSC energies. Examining unitarity constraints, modifications of the cross section formulas are proposed which allow a continued use of formulas in the Regge spirit to describe elastic and diffractive events. The nondiffractive cross section is allowed to rise at a rate consistent with unitarization of multiple parton-parton scatterings. However, in our picture, the rise of the total cross section with increasing energy is only partly due to the minijet cross sections; the diffractive topologies rise as well. Fully differential distributions are given and convenient parametrizations derived for the integrated rates of elastic and diffractive events. Predictions for the various partial cross sections at Fermilab Tevatron, LHC, and SSC energies are given and compared to other estimates. PACS number(s1: 13.85.Hd, 12.40.Nn, 13.85.D~

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Diffraction Dissociation of High-Energy Protons on Hydrogen and Deuterium Targets

Cited by 22 publications

References 22 publications

Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum

Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum

Measurements of single diffraction at √s = 630 GeV; Evidence for a non-linear α(t) of the pomeron

Hadronic diffractive cross sections and the rise of the total cross section

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