# XX International Workshop on Deep-Inelastic Scattering and Related Subjects

26-30 March 2012
University of Bonn
Europe/Berlin timezone

## Confirmation of a new narrow mass state decaying into Upsilon(1S)gamma

28 Mar 2012, 16:18
18m
Drawing Room, Mathematical Institute (University of Bonn)

Heavy flavours

### Speakers

Claus Buszello (Uppsala University (SE)) Claus Buszello (Department of Physics and Astronomy-University of Uppsala) Claus Buszello (Uppsala University)

### Description

Using the 1.3 fb$^{-1}$ sample of D0 RunII data taken between 2002 and 2006, we observe a new state decaying into $\Upsilon(1S) + \gamma$, where the $\Upsilon(1S)$ is detected by its decay into an oppositely charged muon pair, and the photon is reconstructed by its conversion into an electron-positron pair. The significance of this structure is six standard deviations and its mass is consistent with that of the state recently discovered by the ATLAS Collaboration.

### Primary authors

Claus Buszello (Uppsala University (SE)) Claus Buszello (Department of Physics and Astronomy-University of Uppsala) Claus Buszello (Uppsala University)

 Slides