Update on di-hadron modulations

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Presentation transcript:

Update on di-hadron modulations Anselm Vossen 5/3/2013

Modulations PhiR_1 + PhiR2 PhiR_1- PhiR2 (~handedness related) Approach: 2D fit in PhiR1, PhiR2 with given modulations Data: mc on Res Ex55 Use Pi+/Pi-, Pi+/Pi0, Pi0,Pi- combinations Pi0 in signal and background region (>pi0mass) Bin in m,z, labTheta, qT, transverse polarisation projection Also compute asymmetries with counts divided by random charge mixed counts (doesn’t work for G1T)

Ang resolution – lab theta Acceptance effects: Delta(Phi1-Phi2) Use 0.5-2.2 Delta(Sin\theta)

Vs Theta_Lab Iff G1T Handedness

Vs Qt Iff G1T Handedness

Vs M Iff G1T Handedness

Vs Z Iff G1T Handedness

Doesn’t go away using ratios (z,z bin) Handedness Minus Mix Raw

Cut On Lab Theta 1.2-1-6 and Qt<4.7 GeV, Vs M: Iff G1T Handedness

Vs Z Iff G1T Handedness

And again, subtracting charge mix doesn’t help: Handedness, minus Mix vs Z Handedness, minus Mix vs M

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