Daniel de Florian

0.7
0.6
0.5
0.4
0.3
0.2
0.1
3
2
1
3
2
1
0
10 -1
u + u
u
s + s
THIS FIT / KRE
D !
Distributions (Kaons)
THIS FIT / AKK
+
zD K zDi (z)
Q 2 = 10 GeV 2
z
1
gluon
c + c
THIS FIT / KRE
THIS FIT / AKK
10 -1
Smaller u required by SIDIS
VERY different gluon by pp
+
zD K zDi (z)
Q 2 = 10 GeV 2
Similar singlet (larger dominant s)
_
Issues for K- (s and u in proton at large x)
z
1
10
1
10
1
1
10 -1
10 -2
10 -3
10 -4
10 -5
0.5
0
-0.5
THIS FIT
KRE
AKK
E
scale uncertainty
(data - theory)/theory
d 3 ! K
dp 3
[mb / GeV 2 ]
1 2 3 4 5
1 +
0.25 ! z ! 0.35
10 -1
1
10 -1
10 -2
1/N DIS dN K /dzdQ 2
THIS FIT
KRE
1/NDIS dN K /dzdQ 2
-
not fitted
Q 2 [GeV]
z - bin
0.25 - 0.35
0.35 - 0.45
0.45 - 0.60
z - bin
0.25 - 0.35
0.35 - 0.45
0.45 - 0.60
1 10
0
S
K +
0.35 ! z ! 0.45
0.45 ! z ! 0.60
STAR data
Q 2 [GeV]
p T [GeV]
K -
1 10
0.4
0.2
0
-0.2
-0.4
0.4
0.2
0
-0.2
-0.4
0.4
0.2
0
-0.2
-0.4
(data - theory)/theory