[Halld-physics] slides for menu2010

[Alexander Somov]

Hi Eugene,

Thanks for corrections. Actually the talk was yesterday
(I will correct typos  and post slides to the DocDB) -
time was not a problem, I was able to go through all
slides.


According to the latest Curtis summary paper, the
flux-tube model predicts for the decays of the pi1
hybrid:

pi b1: pi f1: pi rho: eta pi : pi eta' =
170 : 60 : 5-20 : 0-10 : 0-10.

rho pi is not a favored decay mode compared with b1 pi,
but might be favored compared with eta(') pi decays.
As I was describing the initial exotic meson search modes
the slide title is kind of not appropriate, I agree. I
should have called it is "Initial Exotic Hybrid Search Modes"
(or smth like this).

Cheers,
        Sascha








On Mon, 31 May 2010, Eugene Chudakov wrote:

> Hi Alex,
>
> I enclose several specific comments. A general comment is the length -
> it is not impossible, but requires a few rehearsals.
> It would be safer to remove a couple of slides.
>
> Cheers
> Eugene
>
> slide 4:
>
> J=L+S should be a vector sum, while in other places as C=(-1)**(L+S)
> L+S is a scalar sum.
>
> I would suggest to add that the lowest gluon excitation adds either 1^{+-) or 
> 1^{-+}
>
> The bottom line "Allowed J^{pc}" might be confused with the regular mesons.
>
> slide 5:
>
> you may write or just say that the new calculations are "unquenched"
> (closer to reality)
>
> slide 6:
>
> why the 3 pion decay is called favored? The model favors one L=1 meson.
> Does is mean a f0 or f2 (2pi dominant decays) with a pion? As far
> as I understand (I may be wrong) rho+pi decay is not favored by
> the tube model.
>
> slide 11:
>
> 40% polarization arrow should point to the main 9 GeV peak (on the JLab 
> windows
> server I am using it points rather to the small 10 GeV peak).
>
> slide 14:
>
> the sign "add in quadratures" should contain "+" instead of "x".
> The sign "x" in a circle means something else.
>
> the large size of BCAL is not obvious (4 m long 1.3 diameter).
>
> slide 16.
>
> it might be useful to mention the assumed width of the shown
> 1-+ state.
>
> slide 18:
>
> "stay tuned, physics results are on the way"
>
> what do you mean? The first physics run is scheduled for May 2016.
>
>
> On Mon, 31 May 2010, Alexander Somov wrote:
>
>> 
>> Dear Colleagues,
>> 
>> I put slides of the MENU2010 GlueX talk to
>> http://www.jlab.org/~somov/menu2010/menu2010.pptx
>> 
>> The talk is today (late afternoon). Just in case someone
>> is online..., please take a look and send me your comments.
>> 
>> Thanks,
>>        Sascha
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>