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Aug 4 – 7, 2022
MIT Laboratory for Nuclear Science
US/Eastern timezone

Feasibility Study of Λd Elastic Scattering in Data From Photoproduction Off Deuteron

Aug 6, 2022, 2:10 PM
20m
26-414 (MIT Laboratory for Nuclear Science)

26-414

MIT Laboratory for Nuclear Science

Speaker

Brandon Tumeo (University of South Carolina)

Description

Experimental observables of Λ-deuteron (Λd) elastic scattering are expected to provide unique and independent constraints on several poorly-known dynamical parameters of the hyperon-nucleon interaction, such as the ΛN spin-triplet scattering length and the ΛNN three-body force. Currently, there are no Λd experimental data. In this work, we present a feasibility study of Λd elastic scattering using the high-luminosity Jefferson Lab experiment E06-103, in which a real-photon beam was incident on a 40-cm long liquid deuterium target. The data were taken with the CEBAF Large Acceptance Spectrometer (CLAS) housed in Hall B. After photoproduction off a deuteron, a Λ beam scatters elastically off another deuteron. By detecting the final-state deuteron, and the proton and pion from Λ decay, reconstruction of the scattered and beam Λ invariant masses and reaction selection was possible. Our analysis shows that the data set contains about 4000 Λd elastic events, covering Λ beam momenta between 600 MeV/c and 1000 MeV/c and Λ center-of-mass cos(theta) between -0.6 and +0.8. Thus, for the first time, the Λd elastic differential and total cross sections will be extracted.

Primary author

Brandon Tumeo (University of South Carolina)

Co-authors

Yordanka Ilieva (University of South Carolina) Nicholas Zachariou (University of York) Pawel Nadel-Turonski (Stony Brook University)

Presentation materials