pi+ and pi- rapidity and cos(theta_cm) spectra for C+C at 1 and 2 A GeV, and Ar+KCl at 1.76 A GeV
yields for LVL1 triggered events: mult_charged>=4 for C+C and mult_charged>=16 for Ar+KCl
rapidity in y_0 = (y_lab-y_cm)/y_cm ,
y_cm = 0.677 and y_cm=0.904 for C+C at 1 and 2 A GeV, and 0.857 for Ar+KCl at 1.76 A GeV
yields in rapidity bins extrapolated to low p_T region outside the acceptance
yields in cos(theta_cm) bins for momenta inside the HADES acceptance and PID cuts: 200 <= mom_cm < 800 MeV/c
files:
piplus_cc1000_y.vec
piminus_cc1000_y.vec
piplus_cc2000_y.vec
piminus_cc2000_y.vec
piplus_arkcl1760_y.vec
piminus_arkcl1760_y.vec
1 row contents: rapidity y_0 (center of bin) , yield, error
piplus_cc1000_costheta_cm.vec
piminus_cc1000_costheta_cm.vec
piplus_cc2000_costheta_cm.vec
piminus_cc2000_costheta_cm.vec
piplus_arkcl1760_costheta_cm.vec
piminus_arkcl1760_costheta_cm.vec
1 row contents: cos(theta_cm) (center of bin) , yield, error
Normalization:
to one LVL1 event,
to unit in rapidity (y_0) or cos(theta_cm)
trigger bias:
To get multiplicity for minimum bias, the data points have to be divided by the trigger enhancement factor F = A_part(LVL1)/A_part(min.bias):
CC1 8.61/6
CC2 8.38/6
ArKCl 38.5/19.25
data are published in:
CC
spectra as in Fig. 11 and 12
in Eur. Phys. J. A 40 (2009) 45 (also arXiv:0902.4377 [nucl-ex])
ArKCl rapidity -
published only for pi- in in Fig.3, Phys.Rev.C82:044907,2010 (arXiv:1004.3881 [nucl-ex])
(shown data are from independent analysis of A. Schmah but difference from "my" numbers are within errors).
For pi+ only integral yield is shown in conf. proceedings arXiv:0906.2309v1 (Bormio 2009) in Table 1
ArKCl cos(theta_cm)
spectra as in Fig. 2 arXiv:0906.2309v1 (Bormio 2009)
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PavelTlusty - 21 Jun 2013