Measurement of Chi(3510) and Chi(3555) Production in 190 Gev/c Negative Pion-Beryllium Interactions

Charmonium production in 190 GeV/c (pi)('-)-Be interactions has been observed. The states (chi)(3510) and (chi)(3555)are seen through their radiative decay into J/(psi), and are found to correspond to 0.29 (+OR-) 0.09 of total J/(psi) production for J/(psi)'s with x(,f) > 0.2. The rate of production for the two (chi) states appears as B(sigma)((chi)(3555)/B(sigma)((chi)(3510) = 0.60 (+OR-) 0.35. The fraction of J/(psi)'s produced through (chi) decay appears to rise with higher x(,f). For J/(psi)'s with x(,f) > 0.42, (chi) decay is responsible for 0.345 (+OR-) 0.09 of the total J/(psi) sample, with the two states produced at the rate B(sigma)((chi)(3555)/B(sigma)((chi)(3510) = 0.82 (+OR-) 0.45.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Lukens, Patrick Thomas

• Physics, Elementary Particles and High Energy

Language dc:language

eng

Identifier

(UMI)AAI8502227

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/77373