Measurement E179M19

Experiment:	SIDIS Dihadron Beam Spin Asymmetry
Year:	2020	Measurement comment: Binning scheme: bins of z, for M_h below and above 0.63 GeV Experiment comment: Process: ep→eπ⁺π^-X Data tables have the following columns: mean Q² mean x mean M_h, the dihadron invariant mass mean z, of the pion pair mean P_T, more commonly written P_h^⊥, is the component of the total dihadron momentum, transverse to q A_LU amplitude, for a particular modulation statistical uncertainty systematic uncertainty For each of the 7 asymmetry modulations, there are 4 tables, one for each binning scheme: (1) binned by x, (2) binned by M_h, (3) binned by z and M_h, and (4) binned by P_T and M_h.
Spokespersons:	C. Dilks, T. Hayward, A. Vossen
Reaction:	ep → π π + X
Polarization:	beam (longitudinal)
Quantity:	A_LU^{sin (2φ_h−2φ_R})
Q²:	1.0 — 10.6 GeV²
W:	2.0 — 4.0 GeV
x:	0.06 — 0.77
E_beam:	10.6041 GeV
Publication:	T.B. Hayward, C. Dilks, A. Vossen, H. Avakian Observation of Beam Spin Asymmetries in the Process ep→eπ+π-X with CLAS12 // (submitted to PRL)

Measurement data
Q², [GeV²]	x	M(π⁺,π⁻), [GeV]	z	P_T, [GeV]	A_LU^{sin (2φ_h−2φ_R})	uncertainty
3.129	0.22	0.464	0.4	0.598	-0.0179368	0.00830858
3.21	0.244	0.468	0.474	0.61	-0.0249752	0.00881827
3.131	0.248	0.472	0.528	0.608	-0.00901092	0.00830535
3.107	0.254	0.47	0.579	0.59	-0.010843	0.00894486
3.021	0.253	0.478	0.638	0.556	-0.024337	0.00824374
2.825	0.234	0.482	0.727	0.5	-0.0307098	0.00983427
2.764	0.192	0.821	0.404	0.386	0.0267209	0.0048908
2.847	0.209	0.859	0.474	0.427	0.0295245	0.0048984
2.862	0.218	0.88	0.528	0.451	0.0307969	0.00454308
2.85	0.223	0.9	0.58	0.466	0.033143	0.00489547
2.785	0.221	0.921	0.638	0.467	0.0387667	0.00458832
2.628	0.202	0.958	0.731	0.438	0.0154585	0.00461609

CLAS Physics Database