# B boson search at KLOE/KLOE-2

### Submission summary

 As Contributors: Elena Perez del Rio Arxiv Link: https://arxiv.org/abs/2112.10110v2 (pdf) Date submitted: 2022-02-08 12:35 Submitted by: Perez del Rio, Elena Submitted to: SciPost Physics Proceedings Proceedings issue: 16th International Workshop on Tau Lepton Physics (TAU2021) Academic field: Physics Specialties: High-Energy Physics - Experiment Approach: Experimental

### Abstract

Following the many contributions, KLOE-2 has done to Dark Matter (DM) searches, an alternative model, where the Dark Force mediator is a hypothetical leptophobic B boson, in contra-position to the U boson or "dark photon", is investigated. The B boson couples mainly to quarks and it can be searched in the Phi decay to {\eta}-B where B will decay in {\pi}0-{\gamma}. So far, investigation of the {\pi}0 -{\gamma} invariant mass shows no clear structure belonging to the signal of the DM mediator, hence, an upper limit in the number of events at 90% with CLs the technique will be established for the decay.

###### Current status:
Editor-in-charge assigned

### Submission & Refereeing History

Submission 2112.10110v2 on 8 February 2022

## Reports on this Submission

### Report

This paper investigates B boson searches at the KLOE-2 experiment at the Da$\Phi$ne $\phi$-factory in Frascati (INFN, Italy).
In particular, the search is pursued in the reaction $\phi\to B\eta$, with the subsequent decay of the B boson into $\pi^0\gamma$ and using the decay $\phi\to\eta\pi^0\gamma$ as Standard Model background.
After investigating the $\pi^0\gamma$ invariant mass distribution, the author found no evidence of a B boson but presented preliminary upper limits on the coupling constant of the new gauge boson to Standard Model particles.
The theoretical framework is well established, the presentation is clear, preliminary results are presented and prospects for improvements are discussed.
As a result, I recommend its publication in SciPost.

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