414
R. Stock
Fig. 7.63 Event by event
fluctuation of the K +− /π +−
ratio in central collisions of
Pb+Pb at
√
s = 17.3 GeV,
relative to mixed event
background (histogram) [272]
]
-
+
+
]/[
-
+K
+
[K
0
0.2
0.4
s
t
n
e
v
E
1
10
10 2
10
3
10 4
PbPb 158 GeV
A
Data
Mixed Events
dyn = 3.1+/-0.4%
Fig. 7.64 The relative
deviation of the event by
event K/π fluctuation width
from the mixed event
background width, σ dyn (see
Eq. (7.76)); at SPS [273] and
RHIC [274] energies
yet higher μ B and lower
√
s. These data will, hence, be re-measured and extended to
lower
√
s by experiments in preparation [260–262] at CERN, RHIC and GSI-FAIR.
This will also help to evaluate alternative tentative explanations invoking fluctuating
canonical suppression [120], or strangeness trapping [275]. Finally, the position of
the critical point needs to be ascertained by lattice theory.
R. Stock
Fig. 7.63 Event by event
fluctuation of the K +− /π +−
ratio in central collisions of
Pb+Pb at
√
s = 17.3 GeV,
relative to mixed event
background (histogram) [272]
]
-
+
+
]/[
-
+K
+
[K
0
0.2
0.4
s
t
n
e
v
E
1
10
10 2
10
3
10 4
PbPb 158 GeV
A
Data
Mixed Events
dyn = 3.1+/-0.4%
Fig. 7.64 The relative
deviation of the event by
event K/π fluctuation width
from the mixed event
background width, σ dyn (see
Eq. (7.76)); at SPS [273] and
RHIC [274] energies
yet higher μ B and lower
√
s. These data will, hence, be re-measured and extended to
lower
√
s by experiments in preparation [260–262] at CERN, RHIC and GSI-FAIR.
This will also help to evaluate alternative tentative explanations invoking fluctuating
canonical suppression [120], or strangeness trapping [275]. Finally, the position of
the critical point needs to be ascertained by lattice theory.