Measurement of the total cross section difference ΔσT(pp) in the energy range from 0.43 to 2.4 GeV

Perrot, F.; Azaĭez, H.; Ball, J.; Bystrický, J.; Chaumette, P.; Chesny, Ph.; Deregel, J.; Fabre, J.; Fontaine, J.M.; Gösset, J.; Lehar, F.; Leo, William R.; Lesquen, A. de; Newsom, C. R.; Onel, Y.; Penzo, A.; Rossum, L. van; Siemiarczuk, T.; Vrzal, J.; Whitten, C.; Yonnet, Jean‐Paul

doi:10.1016/0550-3213(86)90423-2

Cited by 33 publications

(4 citation statements)

References 26 publications

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“…With these corrections becomes A y,y-tot ∼ = tot = −3.2 ± 9.6 mb which compares well to A y,y-tot ∼ = tot = −3.0 of Perrot et al [6]. Considering that i) the beam current was too low by a factor 10 (a beam control failed) and ii) a target cell can increase the reaction rate in the interaction zone by a factor 40-400, the error can be reduced by a factor >20.…”

Section: Resultssupporting

confidence: 67%

The feasibility of the TRIC experiment at COSY

et al. 2009

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For the Time Reversal Invariance experiment at COSY (TRIC) that had been proposed at the Forschungszentrum Jülich a novel technique for measuring total cross sections in internal experiments was developed and the achievable precision of this measuring technique was tested. The experimental idea constitutes a true P-even T-odd null test of TRI. In order to compare to the theoretical upper bound from edm measurements (Haxton and Höring, Nucl Phys A560:469, 1993), the TRI violating observable A y,xz in proton-deuteron forward scattering has to be measured with an accuracy of 10 −6 . An internal TRI experiment can determine the total cross section via the optical theorem by measuring the forward scattering amplitude. In contrast to external experiments, the only calibrated device that is needed is a precise beam current transformer (BCT). The feasibility of an internal TRI experiment was tested at COSY in a measurement of A y,y in p-p scattering, since these values are known. The analysis of the data showed the presence of unexpected large 1/ f noise contributions, which eventually reduced the achievable accuracy by a factor 3. The origin of the 1/ f noise was traced and found to be the Barkhausen noise from the

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Section: Resultssupporting

confidence: 67%

The feasibility of the TRIC experiment at COSY

et al. 2009

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“…The total cross section asymmetry A y,y in transversally polarized p p scattering has been measured at 1690 MeV/c with stochastic cooling and polarizations of the beam and target above 80%. This test measurement gave a total cross section difference of −3.2 ± 9.6 mb compared to that deduced from direct total cross section measurements of −3.0 mb at this momentum [354]. The experimental conditions were rather poor and the error bar could have been reduced by a factor of 20 and even higher precision could be achieved now with the current equipment available at COSY.…”

Section: Discussionmentioning

confidence: 71%

The legacy of the experimental hadron physics programme at COSY

Wilkin¹

2017

Eur. Phys. J. A

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“…In the analysis we have used the data on ha, obtained by Biegert et al [11] (with the Coulomb-nuclear corrections by Lesikar [12]), Stanley et a1 [13], Perrot et aZ [14], and the data on AuL obtained by Auer et uZ [15], Bystricky et uZ [16], Aprile-Gibbone et al [17] and Auer et a1 [18]. The total cross section has been obtained by means of the cubic spline approximation of all available data in the energy range 200-1000 MeV (except of a number of very old data).…”

Section: Analysis Of the Experimental Datamentioning

confidence: 99%

On the evaluation of the real parts of forward pp amplitudes from the data at small t

Shklyarevsky¹

1989

J. Phys. G: Nucl. Part. Phys.

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We discuss the problem of the evaluation of the real parts of forward pp amplitudes directly from the data at small t. The expressions for daldt and for a number of polarisation parameters are derived in the limit of small t by means of an expansion of the non-singular parts of the amplitudes in powers of t. The analysis of the data at small t available in the energy range 330-800 MeV is performed, and the real parts of forward mixed amplitudes are determined. A method suitable for calculation of the Bethe phases at low and medium energies is proposed, and the real parts of forward hadronic amplitudes are calculated. Comparison of these 'measured' real parts with those predicted by the forward dispersion relations reveals a rather satisfactory agreement for the real parts of all three forward hadronic amplitudes.

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Measurement of the total cross section difference ΔσT(pp) in the energy range from 0.43 to 2.4 GeV

Cited by 33 publications

References 26 publications

The feasibility of the TRIC experiment at COSY

The feasibility of the TRIC experiment at COSY

The legacy of the experimental hadron physics programme at COSY

On the evaluation of the real parts of forward pp amplitudes from the data at small t

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