High-precision Measurements of piP Elastic Differential Cross Sections in the Second Resonance Region
I.G. Alekseev, V.A. Andreev, I.G. Bordyuzhin, W.J. Briscoe, Ye.A., Filimonov, V.V. Golubev, A.B. Gridnev, D.V. Kalinkin, L.I. Koroleva, N.G., Kozlenko, V.S. Kozlov, A.G. Krivshich, B.V. Morozov, V.M. Nesterov, D.V., Novinsky, V.V. Ryltsov, M. Sadler, B.M. Shurygin
TL;DR
This paper reports high-precision measurements of pi+-p elastic scattering cross sections in the 800-1240 MeV/c range, enabling detailed comparisons with existing partial-wave analyses and highlighting the need for their updates.
Contribution
It provides the first high-precision differential cross section data in this energy region, facilitating improved partial-wave analysis updates.
Findings
Existing PWAs do not fully agree with new data
Updated PWAs are necessary for accurate modeling
High-precision data enhances understanding of resonance behavior
Abstract
Cross sections for pi+-p elastic scattering have been measured to high precision, for beam momenta between 800 and 1240 MeV/c, by the EPECUR Collaboration, using the ITEP proton synchrotron. The data precision allows comparisons of the existing partial-wave analyses (PWA) on a level not possible previously. These comparisons imply that updated PWA are required.
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