Contents

# Contents

## Idea

The pentaquark is a bound state of 5 quarks (as opposed to just 3 in baryons and 2 in mesons) which after a long history of theoretical prediction and inconclusive experimental signatures was finally observed beyond doubt by the LHCb collaboration.

## References

Detection due to

• LHCb collaboration, Observation of $J/\psi b$ resonances consistent with pentaquark states in $\Lambda^0_b \to J/\psi K^- p$ decays, Phys. Rev. Lett. 115, 072001 (2015) (arXiv:1507.03414)

Review in