DVCS at 6/12 GeV, and ideas for the EIC

Introduction Initial results Dedicated experiments Future 6 GeV 12 GeV EIC Conclusion
2
|BH+DVCS|
2
|BH|
2
|BH+DVCS|
2
- |BH|
2
2
2
2
Hall A E00-110
DVCS cross section in the valence region (Hall A: E00-110)
◮ Helicity-dependent cross
section ( → σ − ← σ ) at
Q 2 = 1.5, 1.9 and 2.3 GeV 2 .
)
4
DVCS cross section (nb/GeV
0.04
0.03
0.02
0
0
-0.02
-0.03
-0.04
0.02
0
0
-0.02
< t > = - 0.33 GeV
E00-110
Total fit
Twist - 2
90 180 270
φ
2
0.04
0.02
0
-0.02
-0.04
0.02
0
-0.02
(deg)
< t > = - 0.28 GeV
90 180 270
2
0.04
0.02
0
-0.02
-0.04
0.02
0
-0.02
φ (deg)
< t > = - 0.23 GeV
90 180 270
2
0.04
0.02
0
-0.02
-0.04
0.02
0
-0.02
φ (deg)
< t > = - 0.17 GeV
90 180 270
2
φ (deg)
= 1.5 GeV
Q
= 1.9 GeV
Q
◮ Helicity-independent
cross section ( → σ + ← σ ) at
Q 2 = 2.3 GeV 2 only .
)
4
DVCS cross section (nb/GeV
0.02
0
-0.02
0.1
0.05
0
2
< t > = - 0.33 GeV
E00-110
Total fit
Twist - 2
E00-110
2
< t > = - 0.28 GeV
2
< t > = - 0.23 GeV
2
< t > = - 0.17 GeV
beam helicity-independent beam helicity-dependent
90 180 270
90 180 270
90 180 270
90 180 270
φ (deg)
φ (deg)
φ (deg)
φ (deg)
Carlos Muñoz Camacho
LPC Clermont-Ferrand, CNRS/IN2P3
DVCS at 6/12 GeV and ideas for EIC 12