Theoretical description of the decays Λb→Λ(*)(12±,32±)+J/ψ

Theoretical description of the decays Λb→Λ(*)(12±,32±)+J/ψ We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(*)(JP)+J/ψ, where the Λ(*)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ*(1520,32-) and the Λ*(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ*(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ*(32±)(→pK-)+J/ψ involves the same final state. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Theoretical description of the decays Λb→Λ(*)(12±,32±)+J/ψ

Preview Only

Theoretical description of the decays Λb→Λ(*)(12±,32±)+J/ψ

Abstract

We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(*)(JP)+J/ψ, where the Λ(*)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ*(1520,32-) and the Λ*(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ*(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ*(32±)(→pK-)+J/ψ involves the same final state.
Loading next page...
 
/lp/aps_physical/theoretical-description-of-the-decays-b-12-32-j-RW99SNgYwE
Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.96.013003
Publisher site
See Article on Publisher Site

Abstract

We calculate the invariant and helicity amplitudes for the transitions Λb→Λ(*)(JP)+J/ψ, where the Λ(*)(JP) are Λ(sud)-type ground and excited states with JP quantum numbers JP=12±, 32±. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λ*(1520,32-) and the Λ*(1890,32+) are suppressed compared with those for the ground state Λ(1116,12+) and the excited state Λ*(1405,12-). This analysis is important for the identification of the hidden charm pentaquark states Pc+(4380) and Pc+(4450) which were discovered in the decay chain Λb0→Pc+(→pJ/ψ)+K- because the cascade decay chain Λb→Λ*(32±)(→pK-)+J/ψ involves the same final state.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jul 1, 2017

There are no references for this article.

Sorry, we don’t have permission to share this article on DeepDyve,
but here are related articles that you can start reading right now:

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off