CLAS Physics Database

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Measurement E103M6

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Experiment: g7a: Search for medium modification of light vector mesons off nuclei, 2007

Spokespersons: D. Weygand, C. Djalali, M. Kossov

Publication:

R. Nasseripour, M. Wood, C. Djalali, D. Weygand, C. Tur, U. Mosel, P. Muehlich Search for Medium Modifications of the ρ Meson // Phys. Rev. Lett. 99, 262302 (2007)

Quantity measured: dY/dM_ρ(e⁺, e⁻), counts/24MeV
Differential yield, where M_ρ(e⁺,e⁻) is current ρ-meson mass.
Beam: γ, polarization: none
Target: Fe56 (Z=26, A=56), polarization: none
Final state: ρ + X, polarization: none

E_γ :	0 — 3.8 GeV
E_beam :	4 GeV

Observable quantity measured (Y axis): dY/dM_ρ(e⁺, e⁻), counts/24MeV
Plot measurement data

Parameter (X axis): M_ρ(e⁺,e⁻), GeV

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

Measured data:

M_ρ(e⁺,e⁻), GeV	dY/dM_ρ(e⁺, e⁻), counts/24MeV	Data errors, counts/24MeV
0.156	-0.001	0
0.18	-0.048	0
0.204	0.839	1.265
0.228	-1.699	0
0.252	1.338	1.897
0.276	-2.682	0
0.3	-3.331	0
0.324	2.393	2.408
0.348	0.612	2
0.372	-3.744	0
0.396	4.595	2.966
0.42	2.765	2.757
0.444	15.435	4.561
0.468	2.257	2.864
0.492	22.506	5.422
0.516	30.581	6.132
0.54	23.427	5.568
0.564	17.492	5.02
0.588	38.297	6.797
0.612	40.443	6.87
0.636	36.665	6.496
0.66	41.278	6.753
0.684	56.391	7.81
0.708	55.96	7.874
0.732	83.468	9.644
0.756	61.35	9.165
0.78	76.143	13.446
0.804	40.196	7.616
0.828	31.247	5.865
0.852	25.931	5.235
0.876	25.182	5.119
0.9	10.535	3.376
0.924	18.885	4.45
0.948	13.823	3.847
0.972	4.339	2.408
0.996	19.861	4.858
1.02	-0.303	4.899
1.044	7.822	3.286
1.068	10.903	3.376
1.092	2.949	1.789
1.116	3.904	2
1.14	4.531	2.145
1.164	2.55	1.612
1.188	4.172	2.049