Theoretical study of f 0 ( 980 ) , a 0 ( 980 ) and Ξ ( 1 / 2 − ) in the process Ξ c + → Σ + K + K −

We employed the chiral unitarity approach to investigate the decay process Ξ c + → Σ + K + K − , by considering that the low lying nucleon resonance Ξ ( 1 / 2 − ) and the low lying scalar meson f 0 ( 980 ) and a 0 ( 980 ) that could be dynamically generated through the S -wave pseudoscalar meson-octet baryon and the S -wave pseudoscalar-meson–pseudoscalar-meson interactions, respectively. In the invariant mass distributions of Σ + K − and K + K − , we observe a distinct peak structure associated with the resonant state Ξ ( 1 / 2 − ) and a bit enhancement near the K + K − threshold that is corresponding to the mesons f 0 ( 980 ) and a 0 ( 980 ) , respectively. Consequently, we recommend more precise experimental measurements of this process in the future.