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Some Hyperon Correlation Questions H. A. Neal February 11, 2015 Group Meeting Some Questions from Homer (pg1) QUESTION Why do we think L L is a good template to use in examining L L correlation results? What does the ratio test? How can the detector know anything about a correlation between q1 and q2 if it can not tell the difference between q1 and q2 ? Why do we use D-R to present our results when everybody else uses Q? Doesn’t symmetry force our measured correlation for L L to be zero? Some Questions from Homer (pg2) QUESTION The correlation formula that we use -> < C1 > < C2 > - < C1 C2 >. Is it proper to use this as a “probability”? It is not bounded. If there is a correlation, it will grow with the “C’s” Concerning the above, would it make sense to divide by< C1 > < C2 > + < C1 C2 >? Is the shape-change Tom sees near DR = .1 due to the onset of Fermi-Dirac/ Bose-Eintein statistics (see other papers) What have we learned from the generator-level MC results What is the correct pdf to use? • f1 = (1/2) ( 1 + a q1 cos( Q1 ) ) • f2 = (1/2) ( 1 - a q2 cos( Q2 ) ) • …and for small correlations … f1 * f2 (?) • F = (1/4) { 1 - a q2 cos( Q2 ) + a q1 cos( Q1) + a2 q1 q2 cos (Q1 ) cos(Q2 )} • How can we trust F to give us some idea of the Q1 - Q2 correlation when we find significant “polarizations” that we know shouldn’t be there? Delta-Eta Distribution Lambda - Lambdabar Lam - Lam Effective mass distribution Lambda - LambdaBar Lam-Lam Theta1 for proton in LamLambar Theta2 for antiproton in LamLambar Lam-Lam theta1 Lam-Lam theta2 Correlation vs R-Band .09875 Lam - LamBar Lam- Lam Correlation vs R-Band .03625 Lam-LamBar Lam - Lam