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Title: Observation of Z b (10610) and Z b (10650) Decaying to B Mesons

Journal Article · · Physical Review Letters
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  1. Virginia Polytechnic Institute and State University

We detail the analysis of the three-body e + e - B B ¯ π ± , B B ¯ * π ± , and B * B ¯ * π ± processes, including the first observations of the Z b ± ( 10 610 ) [ B B ¯ * + c . c . ] ± and Z b ± ( 10 650 ) [ B * B ¯ * ] ± transitions that are found to dominate the corresponding final states. We measure Born cross sections for the three-body production of σ ( e + e - [ B B ¯ * + c . c . ] ± π ) = [ 17.4 ± 1.6 ( stat ) ± 1.9 ( syst ) ] pb and σ ( e + e - [ B * B ¯ * ] ± π ) = [ 8.75 ± 1.15 ( stat ) ± 1.04 ( syst ) ] pb and set a 90% C.L. upper limit of σ ( e + e - [ B B ¯ ] ± π ) < 2.9 pb . The results are based on a 121.4 fb - 1 data sample collected with the Belle detector at a center-of-mass energy near the Υ ( 10 860 ) peak.

Research Organization:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Organization:
Belle Collaboration
Grant/Contract Number:
SC0009973
OSTI ID:
1594390
Alternate ID(s):
OSTI ID: 1344055; OSTI ID: 1254349
Report Number(s):
PNNL-SA--120664
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 116; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Chromopolarizabilities of bottomonia from the ϒ ( 2 S , 3 S , 4 S ) → ϒ ( 1 S , 2 S ) π π transitions journal September 2019
The XYZ states revisited journal July 2018
Some decay properties of hidden-charm pentaquarks as baryon-meson molecules text January 2019
Nonstandard heavy mesons and baryons: Experimental evidence journal February 2018
Spin partners W b J from the line shapes of the Z b ( 10610 ) and Z b ( 10650 ) journal May 2019
Line shapes of the Z b ( 10610 ) and Z b ( 10650 ) in the elastic and inelastic channels revisited journal October 2018
Some decay properties of hidden-charm pentaquarks as baryon-meson molecules journal August 2019
Hadronic molecules journal February 2018
The XYZ states revisited text January 2018
Spin partners of the Z b (10610) and Z b (10650) revisited journal June 2017