# Large hadronic power corrections or new physics in the rare decay B-->K* mu+ mu- ?

## TL;DR

This paper investigates whether the anomalies observed in B-->K* mu+ mu- decays are due to underestimated hadronic power corrections or indicative of new physics, by comparing two global data fits.

## Contribution

It provides a direct comparison of global fits under different assumptions to clarify the origin of the anomalies in B-->K* mu+ mu- decays.

## Key findings

- Comparison favors hadronic correction explanation over new physics
- Identifies key areas for future experimental and theoretical investigation
- Highlights the importance of accurately estimating power corrections

## Abstract

The well-known problem of the unknown power corrections within QCD improved factorisation leaves the interpretation of the so-called LHCb anomalies in the angular observables of B-->K* mu+ mu- as an open problem. In order to contribute to the question whether they represent a first sign for new physics beyond the Standard Model or a consequence of underestimated hadronic power corrections, we present a direct comparison of two global fits to the data based on the two different assumptions. In addition, we summarise the possible options to resolve this puzzle in the future.