Measurement E179M14

Experiment:	SIDIS Dihadron Beam Spin Asymmetry
Year:	2020	Measurement comment: Binning scheme: bins of M_h 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−φ_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−φ_R})	uncertainty
3.145	0.249	0.338	0.53	0.638	0.00195179	0.00613249
3.09	0.242	0.422	0.546	0.589	0.000273091	0.00568156
3.057	0.24	0.496	0.551	0.571	0.00330107	0.00594337
3.056	0.238	0.568	0.55	0.549	-0.011903	0.00545683
3.0	0.233	0.641	0.547	0.519	-0.00640669	0.00522128
2.918	0.225	0.708	0.55	0.494	-0.0152138	0.00465744
2.893	0.222	0.759	0.555	0.472	-0.0084841	0.00486695
2.855	0.219	0.805	0.559	0.458	-0.00926216	0.00466098
2.826	0.216	0.864	0.56	0.434	-0.0022425	0.00424473
2.764	0.209	0.939	0.569	0.417	-0.00955984	0.00417187
2.665	0.199	1.045	0.579	0.394	-0.00715822	0.00379735
2.471	0.18	1.271	0.628	0.378	0.0038687	0.00360298

CLAS Physics Database