Cabibbo-favored <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo linebreak="badbreak" linebreakstyle="after">+</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:msub><mml:mrow><mml:mi>a</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msub><mml:msup><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mn>980</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mo linebreak="badbreak" linebreakstyle="after">+</mml:mo></mml:mrow></mml:msup></mml:math> decay in the final state interaction
Yao Yu, Y. K. Hsiao
Abstract
The anti-triplet charmed baryon decays with the light scalar mesons are rarely measured, whereas the recent observation of the Cabibbo-favored Λc+→Ληπ+ decay hints a possible Λc+→Λa0(980)+,a0(980)+→ηπ+ process. We hence study the Λc+→Λa0(980)+ decay. Particularly, it is found that the final state interaction can give a significant contribution, where Σ+(1385) and η in Λc+→Σ+(1385)η by exchanging a charged pion are transformed as Λ and a0(980)+, respectively. Accordingly, we predict B(Λc+→Λa0(980)+)=(1.7−1.0+2.8±0.3)×10−3, accessible to the BESIII, BELLEII and LHCb experiments.
Topics & Concepts
LambdaPhysicsParticle physicsMesonBaryonPionQuantum mechanicsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research