1. Bottomonium Discussion
G.Manca
6 March 2013

2. Introduction - Bottomonium
I will try to summarise what I think was interesting and needs to be discussed further
G.Manca, LAL Charmonium Workshop

3. G.Manca, LAL Charmonium Workshop
Upsilon family
We discovered it
We measured the cross sections, at different √s
We measured the polarisation
We measured the feed-down
G.Manca, LAL Charmonium Workshop

4. G.Manca, LAL Charmonium Workshop
What now ?
Is it interesting to measure the cross sections to higher precision ? To higher pT? at different energies ?
Maybe no, if we do not know the feed-down
Also the 3S has some feed-down!
Is this an interesting quantity
G.Manca, LAL Charmonium Workshop

5. G.Manca, LAL Charmonium Workshop
Polarisation
CMS measured the polarisation-beautiful!
Can we learn anything ?
G.Manca, LAL Charmonium Workshop

6. Maybe we should leave alone the Y…
What about the cb?
And the less famous sisters, hb, hb…? Everything can be measured there!
Hard…How important ?
G.Manca, LAL Charmonium Workshop

7. G.Manca, LAL Charmonium Workshop
What about the Bc ?
LHCb’s new “toy” 
Can Atlas and CMS see it ?
We will soon have a lot of data.
New decay channels
Precise mass measurement
Lifetime
Excited states
More ??
G.Manca, LAL Charmonium Workshop

8. G.Manca, LAL Charmonium Workshop
Conclusions
We have performed the “first” round of measurements.
Now we have enough data to refine them and attack new areas.
We alas also have limited manpower and bandwidth—what shall we do?
Let’s have this kind of meetings once a year !!!
They are great 
G.Manca, LAL Charmonium Workshop

9. G.Manca, LAL Charmonium Workshop
extra
G.Manca, LAL Charmonium Workshop

10. Upsilon Cross sections
LHCb Unofficial
The cross section of the three upsilons’ states was measured as a function of pT and y
G.Manca, Charmonium LAL

11. G.Manca, Charmonium Workshop @ LAL
Compared with theory
LHCb Unofficial
S. J. Brodsky and J.-P. Lansberg, PRD 81 (2010)
NLO CSM slightly undershoots the data [direct production only]
Better agreement with Y(3S) -> negligible (?) feed-down
G.Manca, Charmonium LAL