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Title: Search for the Xi(2220) and Study of the X(3872) at BaBar

Abstract

The BABAR Collaboration performed a search for x (2220) production in the initial-state radiation process e{sup +}e{sup -} {yields} {gamma} J/{Psi}, J/{Psi} {yields} {gamma}K{sup +}K{sup -} or J/{Psi} {yields} {gamma}K{sub S}{sup 0}K{sub S}{sup 0}. No evidence for the {xi} (2220) resonance has been found. The 90% confidence level upper limits on the product of branching fractions are sensitive to the spin and helicity hypotheses. These upper limits are of the order 10{sup -5}, below the values reported in previous experiments. Also at BABAR, the decays B {yields} J/{Psi} {pi}{sup +}{pi}{sup -}{pi}{sup 0}K are studied to search for the decay X(3872) {yields} J/{Psi}{gamma}. This search yields a four standard deviation evidence for X(3872) {yields} J/{Psi}{omega}, with product branching fractions of {Beta}(B{sup +} {yields} X(3872)K{sup +}) x {Beta}(X(3872) {yields} J/{Psi}{omega}) = [0.6 {+-} 0.2(stat) {+-} 0.1(syst)] x 10{sup -5}, and {Beta}(B{sup 0} {yields} X(3872)K{sup 0}) x {Beta}(X(3872) {yields} J/y{Psi}) = [0.6 {+-} 0.3(stat) {+-} 0.1(syst)] x 10{sup -5}. A detailed study of the {pi}{sup +}{pi}{sup -}{pi}{sup 0} mass distribution from X(3872) decay favors a negative-parity assignment but does not rule out the positive-parity hypothesis.

Authors:
;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1043197
Report Number(s):
SLAC-PUB-15084
arXiv:1012.0074; TRN: US1203018
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Journal Name:
PoS ICHEP2010:146,2010
Additional Journal Information:
Conference: To appear in the proceedings of 35th International Conference on High Energy Physics: ICHEP 2010, Paris, France, 21-28 Jul 2010
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DECAY; HELICITY; HIGH ENERGY PHYSICS; HYPOTHESIS; MASS DISTRIBUTION; PRODUCTION; RADIATIONS; RESONANCE; SPIN; Experiment-HEP,ASTRO

Citation Formats

Mokhtar, Arafat Gabareen, and /SLAC. Search for the Xi(2220) and Study of the X(3872) at BaBar. United States: N. p., 2012. Web.
Mokhtar, Arafat Gabareen, & /SLAC. Search for the Xi(2220) and Study of the X(3872) at BaBar. United States.
Mokhtar, Arafat Gabareen, and /SLAC. Wed . "Search for the Xi(2220) and Study of the X(3872) at BaBar". United States. https://www.osti.gov/servlets/purl/1043197.
@article{osti_1043197,
title = {Search for the Xi(2220) and Study of the X(3872) at BaBar},
author = {Mokhtar, Arafat Gabareen and /SLAC},
abstractNote = {The BABAR Collaboration performed a search for x (2220) production in the initial-state radiation process e{sup +}e{sup -} {yields} {gamma} J/{Psi}, J/{Psi} {yields} {gamma}K{sup +}K{sup -} or J/{Psi} {yields} {gamma}K{sub S}{sup 0}K{sub S}{sup 0}. No evidence for the {xi} (2220) resonance has been found. The 90% confidence level upper limits on the product of branching fractions are sensitive to the spin and helicity hypotheses. These upper limits are of the order 10{sup -5}, below the values reported in previous experiments. Also at BABAR, the decays B {yields} J/{Psi} {pi}{sup +}{pi}{sup -}{pi}{sup 0}K are studied to search for the decay X(3872) {yields} J/{Psi}{gamma}. This search yields a four standard deviation evidence for X(3872) {yields} J/{Psi}{omega}, with product branching fractions of {Beta}(B{sup +} {yields} X(3872)K{sup +}) x {Beta}(X(3872) {yields} J/{Psi}{omega}) = [0.6 {+-} 0.2(stat) {+-} 0.1(syst)] x 10{sup -5}, and {Beta}(B{sup 0} {yields} X(3872)K{sup 0}) x {Beta}(X(3872) {yields} J/y{Psi}) = [0.6 {+-} 0.3(stat) {+-} 0.1(syst)] x 10{sup -5}. A detailed study of the {pi}{sup +}{pi}{sup -}{pi}{sup 0} mass distribution from X(3872) decay favors a negative-parity assignment but does not rule out the positive-parity hypothesis.},
doi = {},
journal = {PoS ICHEP2010:146,2010},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {6}
}

Conference:
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