High pT physics with ECAL at SIS100

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High pT physics with ECAL at SIS100

• Sergey Kiselev, ITEP Moscow for the ECAL group
• Intoduction
• High pT physics with ECAL at RHIC
• High pT at SPS
• pT/p limits at SIS100
• High pT p0 at SIS100
• Prompt ? at SIS100
• High pT cumulative ? at SIS100
• Summary

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High pT physics with ECAL at RHIC (QM09)
arXiv0904.4764
High-pT v2
arXiv0903.4886
Direct ?-h azim.corr.
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High pT physics with ECAL at SPS (WA98)
PRL 100 242301 (2008)
PRL 85 3595 (2000)
Suppression of high pT p0 at SPS
First direct photons in AA
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SIS100/300

• CBM at SIS 300 will start in 2017
• 10 - 45 AGeV beam energy,
• high availability of beam (10 weeks per year),
  
• interaction rates up to 10 MHz
• CBM and HADES at SIS 100 in 2015
• Au beam up to 11 AGeV,
• p beam up to 30 GeV, targets p ?, C,
• interaction rates ?

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Data on high pT pions in pp
E.W.Beier et al., PR D18, 2235 (1978)
?c.m. 900
change of spectrum shape between 24 and 200
GeV No high pT data in this region SIS100/300 can
cover the range E lt 30/90 GeV
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pT/p limits for pp at SIS100
pTmax 2, 2.9, 3.6 for T10, 20, 30 respectively
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Central rapidity region at SIS100
?c.m. 700 - 900 ? ?lab. 90 - 250, plab.
5 - 20 GeV/c
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High pT p0 at SIS
To reach pT 3 GeV/c high interaction rate
and/or high pT ECAL trigger are needed
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Prompt ? at SIS100
A Compilation of Data J. Phys. G, 23 (1997)
A1 Data fit D.Srivastava, Eur.Phys.J, C22 (2001)
129
SIS100/300 can cover the range vs 8/13 GeV
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Prompt ? at SIS100 cont.

• Data fit (xTgt0.1) Ed3spp/d3p 575(vs)3.3
  /(pt)9.14 pb/GeV2
• For AB Ed3N/d3p(b) Ed3spp/d3p TAB(b)
  Ed3spp/d3p Ncoll/ sppin

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High pT photons at SIS100
one can hope ?prompt/?p0 gt 5 at pT 3
GeV/c to extract prompt ?
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High pT cumulative ? at SIS100
For the pC reaction using fast ECAL trigger on
high pT cumulative ? one can study by other CBM
subdetectors a system accompanying this
cumulative ?
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Summary
Using a high pT ECAL trigger one can measure
in pA at SIS100 high pT ? in the central
rapidity region - to cover the gap in high pT
pion data - to give a normalization to evaluate
RAA for p0 in AA at SIS300 - to try extract
prompt photons - to study using other CBM
subdetectors a system accompanying the high
pT cumulative ?