CLAS Physics Database

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Measurement E103M5

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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: C12 (Z=6, A=12), 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
0.132	1	1
0.156	-0.024	0
0.18	1.146	1.095
0.204	2.021	1.949
0.228	-0.384	1.612
0.252	-5.195	0.001
0.276	-0.953	2
0.3	-5.357	0.632
0.324	-0.174	2.49
0.348	16.818	4.817
0.372	11.758	4.336
0.396	7.539	3.899
0.42	3.94	3.633
0.444	26.468	6.017
0.468	18.618	5.459
0.492	8.576	4.539
0.516	24.038	6.116
0.54	23.619	6.083
0.564	33.185	6.914
0.588	34.502	6.986
0.612	60.71	8.532
0.636	69.978	8.877
0.66	56.128	7.899
0.684	78.287	9.22
0.708	93.221	10.1
0.732	112.701	11.269
0.756	96.548	11.576
0.78	92.555	17.268
0.804	61.284	9.798
0.828	39.887	6.753
0.852	28.177	5.532
0.876	21.327	4.775
0.9	19.446	4.539
0.924	7.167	2.864
0.948	10.909	3.493
0.972	7.507	3.033
0.996	20.188	5.04
1.02	1.213	6.782
1.044	6.713	3.493
1.068	4.797	2.408
1.092	1.444	1.342
1.116	2.77	1.732
1.14	4.269	2.098
1.164	4.291	2.098
1.188	0.936	1