CLAS Physics Database

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Measurement E216M430

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Experiment: CLAS12 Run Group A, 2018

Spokespersons: Krishna Chandra

No publications available for this experiment

Quantity measured: dσ/d(−cos(θ(π−))), mcbn/rad
Differential cross section, where cos(θ(π−) is cosine of the azimuthal angle of π− in CMS.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: π+π−p, polarization: none

Q2 : 3.5 — 4.2 GeV2
W : 1.65 — 1.7 GeV

Observable quantity measured (Y axis): dσ/d(−cos(θ(π−))), mcbn/rad
Plot measurement data

Parameter (X axis): θ(π−), deg

Click here to get data in text file, delimited with tabs.

Measured data:

θ(π−),
deg
dσ/d(−cos(θ(π−))),
mcbn/rad
Stat. error,
mcbn/rad
Syst. error,
mcbn/rad
9 1.63021 0.135162 0.24287776
27 1.38433 0.0560932 0.15576395
45 1.37466 0.0690777 0.13751522
63 1.18149 0.0614139 0.11554568
81 0.991589 0.0468293 0.0895215
99 0.988558 0.0607287 0.0926107
117 0.872053 0.0324482 0.107924
135 0.869399 0.0368605 0.09041256
153 1.04542 0.0567886 0.09763104
171 1.12846 0.0879714 0.13366933