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ΛC Semileptonic Decays in a Quark Model

Title: ΛC Semileptonic Decays in a Quark Model.
Name(s): Hussain, Md Mozammel, author
Roberts, Winston, professor directing dissertation
Goldsby, Kenneth A,, university representative
Volya, Alexander, committee member
Crede, Volker, committee member
Owens, Joseph F., III, committee member
Florida State University, degree granting institution
College of Arts and Sciences, degree granting college
Department of Physics , degree granting department
Type of Resource: text
Genre: Text
Doctoral Thesis
Issuance: monographic
Date Issued: 2017
Publisher: Florida State University
Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource (101 pages)
Language(s): English
Abstract/Description: Hadronic form factors for semileptonic decay of the Λ[subscript c] are calculated in a nonrelativistic quark model. The full quark model wave functions are employed to numerically calculate the form factors to all orders in (1/m[subscript c], 1/m[subscript s]). The form factors satisfy relationships expected from the heavy quark effective theory (HQET) form factors. No other semileptonic decays of Λ[subscript c] has been reported other than the decay to the ground state Λ that implies f = B(Λ[subscript c]⁺ → Λl⁺ν[subscript l])/B(Λ[subscript c]⁺ → X[subscript s]l⁺ν[subscript l]) = 1. In this work, the differential decay rates and branching fractions are calculated for transitions to the ground state and a number of excited states of Λ. The branching fraction of the semileptonic decay width to the total width of Λ[subscript c] has been calculated and compared with other theoretical estimates and experimental results. The branching fractions for Λ[subscript c] → Λ*l⁺ν[subscript l] → Σπl⁺ν[subscript l] and Λ[subscript c] → Λ*l⁺ν[subscript l] → NǨl⁺ν[subscript l] are also calculated. Apart from decays to the ground state Λ(1115), it is found that decays through the Λ(1405) provide a significant portion of the branching fraction Λ[subscript c] → X[subscript s]lν[subscript l]. There are various conjectures on the structure of the Λ(1405) while we treated it as a three quark state. A new estimate for f = B(Λ[subscript c]⁺ → Λl⁺ν[subscript l] is obtained.
Identifier: FSU_2017SP_Hussain_fsu_0071E_13920 (IID)
Submitted Note: A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Degree Awarded: Spring Semester 2017.
Date of Defense: March 20, 2017.
Bibliography Note: Includes bibliographical references.
Advisory Committee: Winston Roberts, Professor Directing Dissertation; Kenneth Goldsby, University Representative; Alexander Volya, Committee Member; Volker Crede, Committee Member; Joseph Owens, Committee Member.
Subject(s): Particles (Nuclear physics)
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Host Institution: FSU

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Hussain, M. M. (2017). ΛC Semileptonic Decays in a Quark Model. Retrieved from