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1 FORWARD-BACKWARD RAPIDITY CORRELATIONS IN A TWO STEP SCENARIO Jorge Dias de Deus José Guilherme Milhano CERN, 2007.

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Presentation on theme: "1 FORWARD-BACKWARD RAPIDITY CORRELATIONS IN A TWO STEP SCENARIO Jorge Dias de Deus José Guilherme Milhano CERN, 2007."— Presentation transcript:

1 1 FORWARD-BACKWARD RAPIDITY CORRELATIONS IN A TWO STEP SCENARIO Jorge Dias de Deus José Guilherme Milhano CERN, 2007

2 2 TWO STEP SCENARIO?... AS A RESULT OF COLLISIONS 1) FORMATION OF EXTENDED OBJECTS IN RAPIDITY, FIRST; 2) FOLLOWED BY LOCAL EMISSION OF PARTICLES [This happens in GLASMA model, SCHWINGER strings, …] FORWARD-BACKWARD RAPIDITY CORRELATIONS: [Two rapidity windows with a rapidity gap between] F = a + bn F b ≡ D 2 FB / D 2 FF

3 3 BASIC FORMULAE NUMBER OF COLLISIONS ~ NUMBER OF STRINGS: : reduction factor, determined by multiplicity

4 4 where and we have assumed Poisson distribution for local emission. MAIN RESULT: [CGC model: ]

5 5 APLLICATION: y B FIXED, MID RAPIDITY y F VARYING, MOVING INTO HIGHER RAPIDITY REWRITE x ≡ / varying, 1 < x < ∞ K’ = k / fixed Ex: k’ = 1

6 6


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