Single and double diffractive dissociation in K−p interactions at 32 GeV/c

Givernaud, A.; Saudraix, J.; Cochet, C.; Denegri, D.; Lewin, C.; Turluer, M. L.; Grässler, H.; Gensch, U.; Nowak, S.; Walter, Michael; Kellner, G.; Porth, P.; Triantis, F. A.; Bumazov, V. A.; Паталаха, Д. И.; Starchenko, E. A.; Vlasov, E.; Markytan, M.; Union, France-Soviet; Collaborations, CERN-Soviet Union

doi:10.1016/0550-3213(79)90099-3

Cited by 15 publications

(1 citation statement)

References 23 publications

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“…In the program, the single diffraction cross section is taken from Figure 1 of Goulianos (1995) and the double diffraction cross section is taken from Figure 4 of Affolder et al (2001). We impose a suppression factor for the double diffraction for T p < 31 GeV according to the formula given by Givernaud et al (1979).…”

Section: Simulation Of the Diffractive Interactionmentioning

confidence: 99%

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Kamae¹,

Abe²,

Koi³

2005

ApJ

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We present here a new calculation of the gamma-ray spectrum from pp ! 0 in the Galactic ridge environment. The calculation includes the diffractive p-p interaction and incorporates the Feynman scaling violation for the first time. Galactic diffuse gamma-rays come, predominantly, from 0 ! in the sub-to multiple GeV range. Hunter et al. found, however, an excess in the GeV range (''GeV excess'') in the EGRET Galactic diffuse spectrum above the prediction based on experimental pp ! 0 cross sections and the Feynman scaling hypothesis. We show, in this work, that the diffractive process makes the gamma-ray spectrum harder than the incident proton spectrum by $0.05 in the power-law index and that the scaling violation produces 30%-80% more 0 than the scaling model for incident proton energies above 100 GeV. A combination of the two can explain about half of the GeV excess with the local cosmic proton ( power-law index $2.7). The excess can be fully explained if the proton spectral index in the Galactic ridge is a little harder ($0.2 in power-law index) than the local spectrum. Given also in the paper is that the diffractive process enhances e + over e À and the scaling violation gives 50%-100% higherp yield than without the violation, both in the multiple GeV range.

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Section: Simulation Of the Diffractive Interactionmentioning

confidence: 99%

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Kamae¹,

Abe²,

Koi³

2005

ApJ

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Systematics of exclusive diffraction dissociation modes inK � p interactions at 32 GeV/c

Givernaud¹,

Denegri²,

Lewin³

et al. 1981

Z. Phys. C - Particles and Fields

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Inclusive production of neutral kaons inK − p interactions at 32 GeV/c

Arestov

Borovikov

Bryukhanova

et al. 1981

Z. Phys. C - Particles and Fields

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Single and double diffractive dissociation in K−p interactions at 32 GeV/c

Cited by 15 publications

References 23 publications

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Systematics of exclusive diffraction dissociation modes inK � p interactions at 32 GeV/c

Inclusive production of neutral kaons inK − p interactions at 32 GeV/c

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Single and double diffractive dissociation in K−p interactions at 32 GeV/c

Cited by 15 publications

References 23 publications

Diffractive Interaction and Scaling Violation inpp →π 0Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Diffractive Interaction and Scaling Violation inpp →π 0Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Systematics of exclusive diffraction dissociation modes inK � p interactions at 32 GeV/c

Inclusive production of neutral kaons inK − p interactions at 32 GeV/c

Contact Info

Product

Resources

About

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET

Diffractive Interaction and Scaling Violation inpp →π ⁰Interaction and GeV Excess in Galactic Diffuse Gamma‐Ray Spectrum of EGRET