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TOTEM – Proton disassociation to 3 jets

TOTEM – Proton disassociation to 3 jets. E. Br ücken and K . Österberg, High Energy Physics Division, Department of Physical Sciences, University of Helsinki & Helsinki Institute of Physics. Generator implementation First glance at generator level. Proton disassociation to 3 jets.

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TOTEM – Proton disassociation to 3 jets

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  1. K. Österberg Penn State workshop TOTEM – Proton disassociation to 3 jets E. Brücken and K. Österberg, High Energy Physics Division, Department of Physical Sciences, University of Helsinki & Helsinki Institute of Physics Generator implementation First glance at generator level

  2. K. Österberg Penn State workshop Proton disassociation to 3 jets Single Diffraction pp  p + 3 jets Info on short distance quark structure Partons inside quarks or outside? Estimated cross section: L. Frankfurt, M. Strikman, hep-ph/0210087

  3. Generator implementation • p  uud in rest frame of proton • take t & M values from inclusive PYTHIA6 single diffraction  wrong? (50 GeV < M < 500 GeV) • boost partons to CMF (”phase space”) (assume uniform  distribution) • apply matrix element (”ME”) using MC methods • apply pTjetmax > X GeV requirement • let partons decay using PYTHIA K. Österberg Penn State workshop

  4. K. Österberg Penn State workshop phase space only parton proton  = 90 m T1/T2

  5. K. Österberg Penn State workshop Matrix Element partons proton  = 90 m

  6. K. Österberg Penn State workshop ME + min pTmax partons partons  1 parton with pT > 5 GeV  1 parton with pT > 10 GeV

  7. K. Österberg Penn State workshop ME + pTmax > 5 GeV + T1/T2 acceptance pTmax > 5 GeV & all partons in T1/T2 acceptance & p in RP ( = 90 m)   25 – 250 nb & acc  0.2 %  5  50 events @ 0.1 pb1 (1 day @ L = 1030 cm2 s1)

  8. K. Österberg Penn State workshop ME + pTmax > 10 GeV + T1/T2 acceptance pTmax > 10 GeV & all partons in T1/T2 acceptance   0.1 – 1 nb &   2 %  10  100 events @ 5 pb1  require low * (L  1031 cm2s1)

  9. K. Österberg Penn State workshop ME + pTmax > 5 GeV + T1/T2 acceptance Experimental complication: 2 of 3 partons close in Rij ( = (jetijetj)2 + (jetijetj)2 ) for most of events within T1/T2 acceptance  Rmin 

  10. K. Österberg Penn State workshop Next steps • Verification & optimisation of generator • Exercise on full simulation + track/jet reconstruction

  11. K. Österberg Penn State workshop The End

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