A Possibility of Search for New Physics at LHCb

TL;DR

This paper explores the potential for discovering new physics at LHCb through weak decays of doubly charmed baryons, analyzing unparticle and Z' models, and concluding that observed decays would imply physics beyond these models.

Contribution

It proposes using doubly charmed baryon decays as a new probe for physics beyond the standard model and evaluates specific models' predictions.

Findings

Unparticle and Z' models do not produce large enough decay widths.

Observation of such decays would suggest new physics beyond these models.

Potential for discovering new physics at LHCb through baryon decay channels.

Abstract

It is interesting to search for new physics beyond the standard model at LHCb. We suggest that weak decays of doubly charmed baryon such as $\Xi_{cc}(3520)^+, \Xi_{cc}^{++}$ to charmless final states would be a possible signal for new physics. In this work, we consider two models, i.e. the unparticle and $Z'$ as examples to study such possibilities. We also discuss the cases for $\Xi^0_{bb}, \Xi_{bb}^-$ which have not been observed yet, but one can expect to find them when LHCb begins running. Our numerical results show that these two models cannot result in sufficiently large decay widths, therefore if such modes are observed at LHCb, there must be a new physics other than the unparticle or $Z'$ models.