LHC Seminar

# Recent results on pentaquarks at LHCb

## by Liming Zhang (Tsinghua University (CHINA))

Europe/Zurich
503/1-001 - Council Chamber (CERN)

### 503/1-001 - Council Chamber

#### CERN

162
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Description

In 2015, the LHCb collaboration reported the observation of significant structures in the $J/\psi p$ final state in a sample of $\Lambda_b^0 -> J/\psi p K^-$ decays using Run 1 data, and showed that the structures could only be explained by the presence of exotic hadrons (pentaquarks). This was a major turning point in the exotic baryon spectroscopy. In this seminar,  an update of the study with the full Run 1 and 2 data set collected by the LHCb detector will be presented. With the additional data, a new pentaquark state is observed and the structure reported previously is found to be more complex. Possible interpretations will be also discussed.

Organized by

Michelangelo Mangano, Monica Pepe-Altarelli and Guillaume Unal

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