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High p T physics with ECAL at SIS100

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.

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High p T physics with ECAL at SIS100

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  1. 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 pTπ0 at SIS100 • Prompt γ at SIS100 • High pT cumulative γ at SIS100 • Summary CBM at SIS100, Dubna S.Kiselev

  2. High pT physics with ECAL at RHIC (QM’09) arXiv:0904.4764 High-pT v2 arXiv:0903.4886 Direct γ-h azim.corr. CBM at SIS100, Dubna S.Kiselev

  3. High pT physics with ECAL at SPS (WA98) PRL 85 3595 (2000) PRL 100 242301 (2008) First direct photons in AA Suppression of high pTπ0 at SPS CBM at SIS100, Dubna S.Kiselev

  4. 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 ? CBM at SIS100, Dubna S.Kiselev

  5. Data on high pT pions in p+p c.m. = 900 E.W.Beier et al., PR D18, 2235 (1978) change of spectrum shape between 24 and 200 GeV No high pT data in this region SIS100/300 can cover the range E < 30/90 GeV CBM at SIS100, Dubna S.Kiselev

  6. pT/p limits for p+p at SIS100 pTmax= 2, 2.9, 3.6 for T=10, 20, 30 respectively CBM at SIS100, Dubna S.Kiselev

  7. Central rapidity region at SIS100 c.m. ~ 700 - 900lab. ~ 90 - 250, plab. ~ 5 - 20 GeV/c CBM at SIS100, Dubna S.Kiselev

  8. High pTπ0 at SIS To reach pT = 3 GeV/c high interaction rate and/or high pT ECAL trigger are needed CBM at SIS100, Dubna S.Kiselev

  9. Promptγ 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 √s ~ 8/13 GeV CBM at SIS100, Dubna S.Kiselev

  10. Promptγ at SIS100 – cont. • Data fit (xT>0.1): Ed3σpp/d3p = 575(√s)3.3 /(pt)9.14pb/GeV2 • For A+B: Ed3N/d3p(b) = Ed3σpp/d3p TAB(b) = Ed3σpp/d3p Ncoll/ σppin CBM at SIS100, Dubna S.Kiselev

  11. High pT photons at SIS100 one can hope γprompt/γπ0 > 5% at pT ~ 3 GeV/c to extract prompt γ CBM at SIS100, Dubna S.Kiselev

  12. High pT cumulative γ at SIS100 For the p+C reaction using fast ECAL trigger on high pT cumulative γ one can study by other CBM subdetectors a system accompanying this cumulative γ CBM at SIS100, Dubna S.Kiselev

  13. Summary Using a high pT ECAL trigger one can measure in p+A at SIS100 high pTγ 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 CBM at SIS100, Dubna S.Kiselev

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