occasional meanderings in physics' brave new world

Name:
Location: New Zealand

Marni D. Sheppeard

## Thursday, May 22, 2008

### Oh Mini Me II

Tommaso Dorigo reports from PPC08 on a MiniBooNE talk by Zelimir Djurcic, including a discussion of the low energy excess.
Photonuclear absorption of photons from $\pi_{0}$ decays was found to be a source of events at low energy.
This apparently accounts for some of the excess. Coincidently, there is also available a new PI talk by Jeffrey Harvey, which discusses a low energy QCD (AdS inspired) computation for the MiniBooNE excess based on a novel meson field process which has been neglected in the background analysis (see this paper). Initial results show impressive, if only tentative, agreement with experiment. I am hoping to report further on this after talks by Stephen Brice and Sam Zeller at Neutrino08 next week.

a quantum diaries survivor said...

Ciao Kea, thank you for the link...
MiniBoone is continuing the analysis, and the speaker was anxious to point out to me this morning that they are still investigating, with different datasets...
Yes, the excess is partly explained by unaccounted disappearing gammas in nuclear absorption. However, it remains an issue. We will know more soon I guess.

Cheers,
T.

May 23, 2008 4:31 AM
Kea said...

Thanks, Tommaso. Yes, I am sure we will know more soon, with many people working on this problem.

May 23, 2008 11:35 AM