All Low Energy Events with MuDst

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All Low Energy Events with MuDst

• 198524 Events
• 10883 Events with at least 1 primary track
• Vx Primary Vertex x position (cm)
• Vy Primary Vertex y position (cm)
• Beam-Beam defined as (Vx2Vy2) lt 2 cm
• 6773 Events
• Beam-Pipe defined as (Vx2 Vy2) gt 2 cm
• 4150 Events

Rosi Reed UC Davis March 26 2008
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All Low Energy EventsGood Events with refMult
gt 158, -100ltVzlt100, Vrlt2
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All Low Energy EventsBold Events cogged at PHENIX
Run 90 started out cogged in PHENIX (6 out of 15
min)
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Z Vertex Position of all Events with at least 1
Primary Track
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Z Vertex Position of all Events with at least 1
Primary Trackand (Vx2 Vy2) lt 2 cm
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Z Vertex Position of all Events with at least 1
Primary Trackand (Vx2 Vy2) gt 2 cm
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XY Vertex Position of all Events with at least 1
Primary Track
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Pi Pi- yields out of 474 events
Pion Mass Assumption
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p p- yields out of 474 events
Proton Mass Assumption p- counts found by
picking a window from p results (mu /- sigma)
and counting of particles within the
window Only done in clean mT-m0 bins
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K K- yields out of 474 events
Kaon Mass Assumption 1st 2 points for each done
by counting particles in a window