[G14_run] DNP meeting contributed talk

Tue Jul 1 20:23:05 EDT 2014

Dear Peng,

You HAVE NO NEUTRON DATA !!  There quasi-neutron or deuteron data!!!

Igor

On Tue, 1 Jul 2014 17:31:27 -0400, Peng Peng <pp9e at virginia.edu> wrote:

> Dear Colleagues,
> 
> I have made some changes base on the suggestions of Igor and Tsuneo, the new 
>version is as follows. 
> 
> -title-
> Polarization observables for double charged pion photo-production with 
>polarized HD target
> -/title-
> 
> -abstract-
> A complete characterization of the spectrum of N* and Delta resonances for 
>nucleon is essential to understand the internal structure of the nucleon. 
>However, both the recent Lattice QCD calculation and the conventional 
>Constitute Quark Model have predicted more resonances than experimentally 
>observed. In order to identify the missing resonances using partial wave 
>analysis, polarization observables are needed to be measured in experiment. 
>The work presented in this talk is to analyze the polarization observables 
>for double charged pion photo-production with polarized HD target(G14 
>experiment in Jlab). With circularly polarized beam, and longitudinal 
>polarized target(one free proton, one bound proton and one bound neutron), 
>three polarization observables in the double pion photo-production are 
>measured. The proton data will be compared with an earlier Jlab experiment 
>G9, and the new neutron data will also be presented.
> -/abstract-
> 
> Cheers,
> Peng
> On Jun 27, 2014, at 12:46 PM, Peng Peng <pp9e at virginia.edu> wrote:
> 
>> Dear Colleagues,
>> 
>> I would like to give a contributed talk in the DNP meeting this Fall. 
>>Following is the abstract, your comments will be greatly appreciated.
>> 
>> -title-
>>   Polarization observables for double charged pion photo-production with 
>>polarized HD target
>> -/title-
>> 
>> -abstract-
>>   A complete characterization of spectrum of N* and Delta resonances for 
>>nucleon is essential to understand the internal structure of the nucleon. 
>>However both the recent Lattice QCD and the conventional Constitute Quark 
>>Model have predicted more resonances than experimentally observed. Most of 
>>these missing resonances lie above 1.8 GeV with broad line-shapes and they 
>>overlap with their neighboring states. To distinguish the overlapping states 
>>requires efforts from both experimentalists and theorists. On the experiment 
>>side, measuring the polarization observables for all the decay channels will 
>>help to remove the ambiguities in deterring the multipoles in partial wave 
>>analysis. On the theory side, using more realistic pion mass in Lattice QCD 
>>calculation and adding the new measured data in the phenomenological models 
>>will provide us a more accurate model. The joint efforts from both the theory 
>>and the experiment will deepen our understanding in the confinement region of 
>>QCD. The work presented in this talk is to analyze the polarization 
>>observables for double charged pion photo-production with polarized HD 
>>target. This experiment with the name G14 was conducted in Hall B in 
>>Jefferson Lab from November 2011 to May 2012. Both circularly and linearly 
>>polarized beam with high polarization were used in G14, and the polarized HD 
>>has both longitudinal polarized protons and neutrons. The center of mass 
>>energy ranges from 1.4GeV to 2.2GeV for circularly polarized beam, and ranges 
>>from 1.6GeV to 2.2GeV for linearly polarized beam. Many final states channels 
>>were produced in this experiment, such as single pion, double pion and Kaon 
>>Lambda, etc. This talk will present the three polarization observables in the 
>>double pion photo-production with both longitudinal polarized proton and 
>>neutron target and circularly polarized beam. An earlier experiment in Hall B 
>>JLab, G9a,  has given the results for this process with polarized proton 
>>target. The new results from G14 will be compared with the G9 results for 
>>proton target, and the new neutron data will also be presented.      
>> 
>> -/abstract-
>> 
>> Cheers,
>> Peng
>> 
>> On Jun 27, 2014, at 12:00 PM, g14_run-request at jlab.org wrote:
>> 
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>>> Today's Topics:
>>> 
>>>   1. g14 group meeting on 27June2014, 9:00am (Charles Hanretty)
>>> 
>>> 
>>> ----------------------------------------------------------------------
>>> 
>>> Message: 1
>>> Date: Thu, 26 Jun 2014 12:06:06 -0400
>>> From: Charles Hanretty <charleshanretty at gmail.com>
>>> Subject: [G14_run] g14 group meeting on 27June2014, 9:00am
>>> To: g14_run at jlab.org
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>>> Content-Type: text/plain; charset="utf-8"
>>> 
>>> Dear Collaborators,
>>> 
>>> Our next group meeting is scheduled for tomorrow, Friday, June 27th,
>>> at 9:00am in room A-110.
>>> 
>>>           (instructions for off-site participants below)
>>> 
>>> Agenda:
>>> * pass1 cooking
>>> * ongoing analyses
>>> * other items
>>> 
>>> (see http://clasweb.jlab.org/rungroups/g14/wiki/index.php/June_27,_2014 )
>>> 
>>> Please update the agenda as required.
>>> 
>>> ==========================================================
>>> Instructions for offsite participants:
>>> * Dial Toll-Free Number: 866-740-1260 (U.S.& Canada)
>>>    o International participants dial: Toll Number: 303-248-0285
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>>> ==========================================================
>>> 
>>> 
>>> -- 
>>> Cheers,
>>> Charles Hanretty
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>>> End of G14_run Digest, Vol 33, Issue 9
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>> 
> 

Igor Strakovsky, SAID CNS The George Washington University
Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org