Λ * (1520) photoproduction

LEPS Analysis Meeting

ΛΛ**(1520) Photoproduction(1520) Photoproduction

2006/12/20Jia-Ye Chen

2006/12/20 LEPS Analysis Meeting

Outline

• Physics Motivation

– Helicity frame decay asymmetry

• Previous Results : LAMP2 and CLAS

• Data Analysis

– Side-Band Subtraction

– Background Estimation (by Muramatsu-san)

2006/12/20 LEPS Analysis Meeting

Physics Motivation

γ ＋ p → K - + Λ(1520)

→ p + K -

2006/12/20 LEPS Analysis Meeting

Previous ResultsCLAS Electroproduction LAMP2 Photoproduction

2006/12/20 LEPS Analysis Meeting

Missing Mass of pK-

2006/12/20 LEPS Analysis Meeting

Invariant Mass of pK-

2006/12/20 LEPS Analysis Meeting

Background Estimation (1)

2006/12/20 LEPS Analysis Meeting

Background Estimation (2)

2006/12/20 LEPS Analysis Meeting

K- Decay Polar Angle (SB)

2006/12/20 LEPS Analysis Meeting

K- Decay Polar Angle (BE)

2006/12/20 LEPS Analysis Meeting

K- Decay Azimuthal Angle (SB)

2006/12/20 LEPS Analysis Meeting

K- Decay Azimuthal Angle (BE)

2006/12/20 LEPS Analysis Meeting

K+ Decay Polar Angle in CMS (SB)

2006/12/20 LEPS Analysis Meeting

K+ Decay Polar Angle in CMS (BE)