[Olympus] GHP abstract

[Michael Kohl]

Dear Norik,

admittedly I used a bit bold language. I am attaching a revised version 
with the two sentences "The results indicate ..." and "There is evidence 
..." removed.

However, the doubts in the correctness of hard TPE not only come from the 
absence of a large effect in R2gamma but also from the epsilon 
independence of the recoil polarizations Pt/Pl and the linearity of RB.
To me it looks like the higher-order effects dominate the phenomenology, 
not hard TPE, and this has been described best by theories like that of 
the Kuraev/Tomasi-Gustafsson group. One important conclusion is that 
additional data at higher Q2 are needed to close the chapter on this.

Best regards
   Michael



On Mon, 19 Dec 2016, Norair Akopov wrote:

>
>
> Dear Michael,
>
> Due to essential change of our main conclusion in the revised paper version I 
> see that you made even more strong statement in the abstract of your talk 
> saying that " The results indicate only little dependence of the cross 
> section on the lepton charge and generate signifcant doubt in the hard 
> two-photon exchange hypothesis" Is it correct? I mean that before we were 
> speculated that observed closenest to unity for R_{\gamma gamma} is mainly 
> due to expected small size of the two-photon exchange effect at compatible 
> low Q^2 relaized at the OLYMPUS kinematcs?  I expect quite hot discussion 
> during any presentation with such a strong in fact negative statement...
>
> Best regards,
> Norik
> On Sun, 18 Dec 2016, Michael Kohl wrote:
>
>> Dear all,
>> 
>> the abstract deadline for the GHP meeting in Washington, DC, Feb. 1-3,
>> 2017 has been extended until Tuesday Dec. 20, 2016.
>> 
>> I am attaching an abstract for a presentation of OLYMPUS results at the
>> GHP meeting. Please send me any comments by Monday EOB.
>> 
>> Thanks and best regards
>>   Michael
>> 
>> 
>> +---------------------------------------------------------------------
>> | Dr. Michael Kohl, Associate Professor and Staff Research Scientist
>> | Physics Department, Hampton University, Hampton, VA 23668
>> | Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
>> | Phone: +1-757-727-5153 (HU), +1-757-269-7343 (Jlab)
>> | Fax:   +1-757-728-6910 (HU), +1-757-269-7363 (Jlab)
>> | Email: kohlm at jlab.org, Cell: +1-757-256-5122 (USA)
>> +---------------------------------------------------------------------
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>

+---------------------------------------------------------------------
| Dr. Michael Kohl, Associate Professor and Staff Research Scientist
| Physics Department, Hampton University, Hampton, VA 23668
| Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
| Phone: +1-757-727-5153 (HU), +1-757-269-7343 (Jlab)
| Fax:   +1-757-728-6910 (HU), +1-757-269-7363 (Jlab)
| Email: kohlm at jlab.org, Cell: +1-757-256-5122 (USA)
+---------------------------------------------------------------------
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