Measurement of proton-proton elastic scattering into the Coulomb region at Pbeam = 2.5, 2.8 and 3.2 GeV/c

Xu, H.; Zhou, Yong; Bechstedt, U.; Böker, J.; Gillitzer, A.; Goldenbaum, F.; Grzonka, D.; Hu, Q.; Khoukaz, A.; Klehr, F.; Lorentz, B.; Prasuhn, D.; Ritman, J.; Schadmand, S.; Sefzick, T.; Stockmanns, T.; Strakovsky, I. I.; Täschner, A.; Wilkin, C.; Workman, R. L.; Wüstner, P.

doi:10.1016/j.physletb.2020.136022

Cited by 4 publications

(3 citation statements)

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“…This enables the possibility to determine σ tot , b, ρ as well as the absolute luminosity by analyzing the characteristic shape of the dN/dt spectrum (i.e. relative differential cross section) [8]. The absolute differential cross section can be normalized by the data in the Coulomb region.…”

Section: Introductionmentioning

confidence: 99%

“…Identification of the elastic scattering events is based on the correlation between the recoil angle and the kinetic energy. A recoil detector based on this idea has already been built and the method of recoil measurement technique was verified using proton beam [8,9]. However, it was found in these tests that the identification of elastic events at small recoil angles was limited by the low-energy background events.…”

Section: Introductionmentioning

confidence: 99%

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The KOALA Experiment for (anti)proton-proton Elastic Scattering

Zhou,

Xu,

Bechstedt

et al. 2021

Preprint

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The KOALA experiment measures the differential cross section of (anti)proton-proton elastic scattering over a wide range of four-momentum transfer squared 0.0008 < |t| < 0.1 (GeV/c) 2 . The experiment is based on fixed target kinematics and uses an internal hydrogen cluster jet target. The wide range of |t| is achieved by measuring the total kinetic energy of the recoil protons near 90°with a recoil detector, which consists of silicon and germanium single-sided strip sensors. The energy resolution of the recoil detector is better than 30 keV (FWHM). A forward detector consisting of two layers of plastic scintillators measures the elastically scattered beam particles in the forward direction close to the beam axis. It helps suppress the large background at small recoil angles and improves the identification of elastic scattering events in the low |t| range. The KOALA setup has been installed and commissioned at COSY in order to validate the detector by measuring the proton-proton elastic scattering. The results from this commissioning are presented here.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The KOALA Experiment for (anti)proton-proton Elastic Scattering

Zhou,

Xu,

Bechstedt

et al. 2021

Preprint

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“…Here v is relative velocity between the scattering particles [29]. φ(q) is the phase which is deeply investigated in the literature, and the result from an eikonal approach gives [30][31][32] φ(q) = −γ + ln(…”

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confidence: 99%

The Realistic Scattering of Puffy Dark Matter

Wang,

Xu,

Zhu

2021

Preprint

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If dark matter has a finite size, the intrinsic interaction responsible for the structure formation is inevitable from the perspective of dark matter self-scattering. The sketch map of the calculation of the cross-section is shown, and a more realistic realization of the matter and charge distribution, the Chou-Yang model, is used in this paper. A new definition of velocity dependence and the implication on the small cosmological structures are studied. The numerical results show that the amplitude coefficient can affect the self-scattering cross-section to a large extent. In particular, we can restore the excluded parameter space in the presence of a non-vanishing amplitude coefficient. The correct relic density favors the super-heavy dark protons.

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The KOALA experiment for (anti)proton–proton elastic scattering

Zhou

Bechstedt

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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Measurement of proton-proton elastic scattering into the Coulomb region at Pbeam = 2.5, 2.8 and 3.2 GeV/c

Cited by 4 publications

References 20 publications

The KOALA Experiment for (anti)proton-proton Elastic Scattering

The KOALA Experiment for (anti)proton-proton Elastic Scattering

The Realistic Scattering of Puffy Dark Matter

The KOALA experiment for (anti)proton–proton elastic scattering

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