Precise measurement of deuteron tensor analyzing powers with BLAST.

Authors :: Zhang C
Kohl M
Akdogan T
Alarcon R
Bertozzi W
Booth E
Botto T
Calarco JR
Clasie B
Crawford C
DeGrush A
Dow K
Farkhondeh M
Fatemi R
Filoti O
Franklin W
Gao H
Geis E
Gilad S
Hasell D
Karpius P
Kolster H
Lee T
Maschinot A
Matthews J
McIlhany K
Meitanis N
Milner R
Rapaport J
Redwine R
Seely J
Shinozaki A
Sindile A
Širca S
Six E
Smith T
Tonguc B
Tschalär C
Tsentalovich E
Turchinetz W
Xiao Y
Xu W
Zhou ZL
Ziskin V
Zwart T
Source :: Physical review letters [Phys Rev Lett] 2011 Dec 16; Vol. 107 (25), pp. 252501. Date of Electronic Publication: 2011 Dec 13.
Publication Year :: 2011
Abstract: We report a precision measurement of the deuteron tensor analyzing powers T(20) and T(21) at the MIT-Bates Linear Accelerator Center. Data were collected simultaneously over a momentum transfer range Q=2.15-4.50 fm(-1) with the Bates Large Acceptance Spectrometer Toroid using a highly polarized deuterium internal gas target. The data are in excellent agreement with calculations in a framework of effective field theory. The deuteron charge monopole and quadrupole form factors G(C) and G(Q) were separated with improved precision, and the location of the first node of G(C) was confirmed at Q=4.19±0.05 fm(-1). The new data provide a strong constraint on theoretical models in a momentum transfer range covering the minimum of T(20) and the first node of G(C).<br /> (© 2011 American Physical Society)