[Halld-physics] DNP Abstract

[Stuart fegan]

Hi everyone,

Further to Justin's comment, and my forgetting APS/DNP abstracts are 
limited to 1300 characters, I've substantially revised my abstract.  
Same idea, but much shorter.  New text below.

Cheers,

Stuart

The GlueX facility, featuring a linearly polarised 9 GeV real photon beam delivered to a large-acceptance detector system, recently completed an initial phase of data taking at energies where quark systems beyond the known baryons and mesons, such as hybrid mesons, tetraquarks and glueballs, may be produced. Analysis efforts are well underway, and results are expected to shed new light on how quarks combine under the strong force, particularly the role played by gluons.
The work presented showcases efforts to measure beam asymmetries in the reaction $\gamma p\rightarrow p\eta\pi$, where both mesons decay to two photons, and whose invariant mass spectrum features both the $a_0(980)$ meson and a nearby signal from $a_2(1320)$. The beam asymmetry of the $\eta\pi$ system can be used to search for exotic signals, for instance through the presence of a non-zero P-wave contribution, which may be seen in asymmetry measurements at small opening angles in the meson decay frame.
Additionally, the t-dependence of the $a_0(980)$ beam asymmetry can provide insight into production mechanisms of this state. Future prospects for related analyses in this reaction topology, informed by these measurements, will also be discussed.

On 01/07/2019 15:05, Justin Stevens wrote:
> Hi Stuart,
>
> The abstract looks OK to me.  The only qualm I would have is with this 
> statement
>
> ...where quark systems beyond the three quark and quark-antiquark 
> systems of baryons and mesons, such as hybrid mesons, tetraquarks and 
> glueballs, should exist
>
> The “should exist” could be argued with, how about replacing it “may 
> be produced”?
>
> -Justin
>
>> On Jun 25, 2019, at 7:18 PM, Stuart fegan <sfegan at jlab.org 
>> <mailto:sfegan at jlab.org>> wrote:
>>
>> Hi Everyone,
>>
>> I am planning to submit an abstract for the upcoming DNP fall 
>> meeting, on the subject of a beam asymmetries in the eta pi (four 
>> photon) system, including a0(980). I'll be building on my existing 
>> eta pi beam asymmetry from MENU and applying the lessons learned into 
>> the a0(980) analysis.  You'll find the abstract attached to this 
>> email.  Comments and suggestions are welcome.
>>
>> Cheers,
>>
>> Stuart
>>
>> -- 
>> Dr Stuart Fegan
>> Postdoctoral Researcher
>> George Washington University/Hall-D
>> F351, CEBAF Center
>>
>> E-mail: sfegan at jlab.org <mailto:sfegan at jlab.org>
>> Telephone: (757)-269-7473
>>
>> <DNPAbstract_fegan.pdf>_______________________________________________
>> Halld-physics mailing list
>> Halld-physics at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/halld-physics
>
-- 
Dr Stuart Fegan
Postdoctoral Researcher
George Washington University/Hall-D
F351, CEBAF Center

E-mail: sfegan at jlab.org
Telephone: (757)-269-7473

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