Experimental study of {chi}{sub b}(2P){yields}{pi}{pi}{chi}{sub b}(1P)

Journal Article · Sun Jan 01 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.012003· OSTI ID:20774570

Cawlfield, C; Eisenstein, B I; Karliner, I ^[1]

---

1. University of Illinois, Urbana-Champaign, Illinois 61801 (United States)

We have searched for the di-pion transition {chi}{sub b}(2P){yields}{pi}{pi}{chi}{sub b}(1P) in the CLEO III sample of {upsilon}(3S) decays in the exclusive decay chain: {upsilon}(3S){yields}{gamma}{chi}{sub b}(2P), {chi}{sub b}(2P){yields}{pi}{pi}{chi}{sub b}(1P), {chi}{sub b}(1P){yields}{gamma}{upsilon}(1S), {upsilon}(1S){yields}l{sup +}l{sup -}. Our studies include both {pi}{sup +}{pi}{sup -} and {pi}{sup 0}{pi}{sup 0}, each analyzed both in fully-reconstructed events and in events with one pion undetected. We show that the null hypothesis is not substantiated. Under reasonable assumptions, we find the partial decay width to be {gamma}({chi}{sub b}(2P){yields}{pi}{pi}{chi}{sub b}(1P))=(0.83{+-}0.22{+-}0.08{+-}0.19) keV, with the uncertainties being statistical, internal CLEO systematics, and common systematics from outside sources.

• OSTI ID: 20774570
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 1; Other Information: DOI: 10.1103/PhysRevD.73.012003; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CESR STORAGE RING
CHI B1-10255 MESONS
HADRONIC PARTICLE DECAY
KEV RANGE
LEPTONIC DECAY
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE WIDTHS
PIONS MINUS
PIONS PLUS
RESONANCE PARTICLES
UPSILON-10355 MESONS
UPSILON-9460 MESONS