Paper

Studying the Strangeness \\(D\\)-Term in Hall C via Exclusive \\(\\) Electroproduction

Niculescu, G, Sparveris, N, Niculescu, I, Peng, C, Z Xu, Shrestha, S, Pilleux, N, Mkrtchyan, H, Kim, M H, Mkrtchyan, A, Atac, H, Tezgin, K, Hoghmrtsyan, A, J -P Chen, Armstrong, W, Lee, S, Higinbotham, D W, S Covrig Dusa, Paolone, M, Camsonne, A, Androić, D, W Li, Hatta, Y, Tadepelli, A, Yin, Z, Tadevosyan, V, Kay, S, Boer, M, Ploen, C, Biswas, D, Paudel, C, Z -E Meziani, C Ayerbe Gayoso, Datta, J, Joosten, S, Xie, J, Żurek, M, Flor, F A, Heinrich, N, Postuma, A, Kim, B, Bhatt, H, Usman, A, Szumila-Vance, H, Klest, H T, Junaid, M, Reimer, P E, Huber, G, Elaasar, M, Mack, D, Ifat, N, J -O Hansen, Kumar, V, Hyde, C E, Dehmelt, K, Markowitz, P, Gaskell, D, McCaughan, M, Klimenko, V

2025

Overview

We propose a measurement of exclusive electroproduction of \\(\\) mesons near threshold in Hall C. We will measure the |t|-dependence of the exclusive \\(\\) electroproduction cross section, which has recently been proposed as an observable sensitive to the strangeness \\(D\\)-term. The contribution of strangeness to the total \\(D\\)-term is presently unknown, with different arguments favoring \\(D_s\\) being large, being small, or even having opposite sign from the total \\(D\\)-term. Our exploratory measurement is designed to distinguish between these hypotheses. If \\(D_s\\) turns out to be small, \\(\\) electroproduction can be used to study the gluon \\(D\\)-term. In addition, this dataset will allow us to perform measurements of other exclusive meson final states, including the first measurement of \\('\\) electroproduction and multi-differential measurements of \\(\\) and \\(\\) electroproduction.

• Publisher: Cornell University Library, arXiv.org
• Subject: Mesons / Strangeness