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High p T physics with ECAL at SIS100. Sergey Kiselev, ITEP Moscow for the ECAL group Intoduction High p T physics with ECAL at RHIC High p T … at SPS p T /p limits at SIS100 High p T π 0 at SIS100 Prompt γ at SIS100 High p T cumulative γ at SIS100 Summary. - PowerPoint PPT Presentation
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20.05.2009 CBM at SIS100, Dubna S.Kiselev
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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 π0 at SIS100
• Prompt γ at SIS100
• High pT cumulative γ at SIS100
• Summary
High pT physics with ECAL at RHIC (QM’09)
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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arXiv:0904.4764
RAA YieldAA/Nbinary AA
Yieldpp
High-pT v2 arXiv:0903.4886Direct γ-h azim.corr.
High pT physics with ECAL at SPS (WA98)
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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PRL 100 242301 (2008)
Suppression of high pT π0 at SPS
PRL 85 3595 (2000)
First direct photons in AA
SIS100/300
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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•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 2015Au beam up to 11 AGeV,
p beam up to 30 GeV, targets: p ?, C, … interaction rates ?
Data on high pT pions in p+p
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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E.W.Beier et al., PR D18, 2235 (1978)c.m. = 900
change of spectrum shape between 24 and 200 GeVNo high pT data in this regionSIS100/300 can cover the range E < 30/90 GeV
pT/p limits for p+p at SIS100
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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pTmax
= 2, 2.9, 3.6 for T=10, 20, 30 respectively
Central rapidity region at SIS100
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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c.m. ~ 700 - 900 lab. ~ 90 - 250, plab. ~ 5 - 20 GeV/c
High pT π0 at SIS
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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To reach pT = 3 GeV/c
high interaction rate and/or high pT ECAL trigger
are needed
Prompt γ at SIS100
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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A Compilation of Data: J. Phys. G, 23 (1997) A1Data fit: D.Srivastava, Eur.Phys.J, C22 (2001) 129
SIS100/300 can cover the range √s ~ 8/13 GeV
Prompt γ at SIS100 – cont.
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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• Data fit (xT>0.1): Ed3σpp/d3p = 575(√s)3.3 /(pt)9.14 pb/GeV2
• For A+B: Ed3N/d3p(b) = Ed3σpp/d3p TAB(b) = Ed3σpp/d3p Ncoll/ σpp
in
High pT photons at SIS100
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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one can hopeγprompt/γπ0 > 5%at pT ~ 3 GeV/cto extract prompt γ
High pT cumulative γ at SIS100
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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For the p+C reaction using fast ECAL trigger on high pT cumulative γ one can study by other CBM subdetectors a system accompanyingthis cumulative γ
Summary
20.05.2009 CBM at SIS100, Dubna S.Kiselev
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Using a high pT ECAL trigger one can measure inp+A at SIS100 high pT γ in the central rapidity region: - to cover the gap in high pT pion data - to give a normalization to evaluate RAA for π0 in AA at SIS300 - to try extract prompt photons - to study using other CBM subdetectors a system accompanying the high pT cumulative γ
