[EIC semi-inclusive] [EXTERNAL] Anything for the JLAB EIC bi-weekly meeting?

Mon Feb 10 06:01:21 EST 2020

Il 08/02/20 04:27, Anselm Vossen ha scritto:

Dear Anselm and dear all,
   I attach one slide, extracted from my talk at CPHI 2020 (and 
simplified for easier reading), where I show the results of Alexei & co. 
(labelled JAM 20) for tensor charges (up, down, isovector) with respect 
to their previous result (JAM 18), to our analysis of di-hadron data 
("global fit"), and to analysis of Collins effect with only SIDIS data 
("Torino" from Anselmino group, "TMD" from Alexei himself + Zhong-Bo and 
others). The broad blue band represents the uncertainty of our "global 
fit" at 90% confidence level (i.e., the area includes 90% of the replicas).
Two comments.

1- "JAM 20" clearly disproves "JAM 18"; the discrepancy for the down 
channel is evident. In other words, I believe that constraining a fit to 
reproduce lattice results (as JAM 18 did) is not a priority. First, one 
should work to include in the fit experimental data from as many 
processes as possible and then compare with lattice. This is what we did 
in our "global fit" (di-hadron production from SIDIS and proton-proton) 
and what Alexei & co. have done in "JAM 20".

2- The error bars of "JAM 20" are very large, so large that they are 
compatible with lattice but also with us ("global fit") and with other 
phenomenology ("Torino" and "TMD"). From the point of view of the 
suspected "tension" at 2-sigma between phenomenology and lattice, their 
result is not conclusive...

Best regards,
Marco

> Dear All,
>
> Here is the new tensor charge extraction that Alexei presented at the 
> Correlations workshop and that I was mentioning at our meeting:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.cern.ch_event_854338_contributions_3707132_attachments_1979933_3296788_Prokudin-5F1-5F09.pdf&d=DwID-g&c=CJqEzB1piLOyyvZjb8YUQw&r=pLVVAf_X8YdFZc9K4xGThyiShtwxjDD2GIo5R00M_W0&m=Vif4_-a5yzkF4kcyEmiKqIQz1LPOz90ziM_m_rx2Taw&s=5MvKrRUiDl4LdPLJ3b7JdMXTgl7k3eKGdi30pXdelIg&e=  
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.cern.ch_event_854338_contributions_3707132_attachments_1979933_3296788_Prokudin-5F1-5F09.pdf&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=pLVVAf_X8YdFZc9K4xGThyiShtwxjDD2GIo5R00M_W0&m=6VQLkdLo6iQsbfqA22AxlFfF2eb7mrk_n7Pzep2p0AU&s=0_xHEL-86OltI_q0LMDbhN89b2-hxWWNw7fekKSPo80&e=>
> It includes A_N data at high x and presumably is not in tension with 
> lattice anymore,
>
> Cheers,
>
> Anselm
>
> Anselm Vossen, Assistant Professor
> Department of Physics, Duke University
> Box 90305, Durham, NC, 27708-0305
> office: 188 Physics
> tel: (919) 660-7593
> cell: (217) 819-6176
> anselm.vossen at duke.edu <mailto:anselm.vossen at duke.edu>
>
>> On Feb 5, 2020, at 4:02 PM, Anselm Vossen, Ph.D. 
>> <anselm.vossen at duke.edu <mailto:anselm.vossen at duke.edu>> wrote:
>>
>> Dear All,
>>
>> I received feedback indicating interest in reports on the R&D meeting 
>> at BNL and potentially the correlations workshop at CERN.
>>
>> Therefore, let's meet Friday at 1:30pm.
>> The bluejeans link is the usual one: https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_141225660&d=DwID-g&c=CJqEzB1piLOyyvZjb8YUQw&r=pLVVAf_X8YdFZc9K4xGThyiShtwxjDD2GIo5R00M_W0&m=Vif4_-a5yzkF4kcyEmiKqIQz1LPOz90ziM_m_rx2Taw&s=hvMPYHvzaQhbZzLnbLvm05_GZDYYIEdDVvPGpsMx8AA&e=  
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_141225660&d=DwMCAg&c=CJqEzB1piLOyyvZjb8YUQw&r=pLVVAf_X8YdFZc9K4xGThyiShtwxjDD2GIo5R00M_W0&m=3EmtiQHPVplSgRColveynM5f4jqE9OBOnvYP-Gr4Mpc&s=HrRrYaFJgW-6KygThhHh0K06bvBYTa4-TfDpTfK7mgE&e=>
>>
>> The agenda can be found here:
>> https://jleic-docdb.jlab.org/cgi-bin/private/DisplayMeeting?sessionid=183 
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__jleic-2Ddocdb.jlab.org_cgi-2Dbin_private_DisplayMeeting-3Fsessionid-3D183&d=DwMFAg&c=imBPVzF25OnBgGmVOlcsiEgHoG1i6YHLR0Sj_gZ4adc&r=6d8XEu2BZdg_J0JcpCj4U6IfRWaAFF6HPVkALDhbHrY&m=pb68tK-r9qhM6pZNlUbU2kVdVVpsvykUA8Q4mYctJJ8&s=Vwkx8OH9SOtazEaRPwgXil37JKiYCi3gFyW0A_k-74E&e=>
>>
>> Please let me know if you want to add to it,
>>
>> Cheers,
>>
>> Anselm
>>
>> ------------------------------------------------------------------------
>> *From:* eic-semi-inclusive <eic-semi-inclusive-bounces at jlab.org 
>> <mailto:eic-semi-inclusive-bounces at jlab.org>> on behalf of Anselm 
>> Vossen <anselm.vossen at duke.edu <mailto:anselm.vossen at duke.edu>>
>> *Sent:* Wednesday, February 5, 2020 9:42:23 AM
>> *To:* eic-semi-inclusive at jlab.org 
>> <mailto:eic-semi-inclusive at jlab.org> <eic-semi-inclusive at jlab.org 
>> <mailto:eic-semi-inclusive at jlab.org>>
>> *Subject:* [EIC semi-inclusive] [EXTERNAL] Anything for the JLAB EIC 
>> bi-weekly meeting?
>> Dear All,
>>
>> We are scheduled to have our bi-weekly meeting on Friday at 1:30pm.
>> I am not aware of any request to present/discuss a topic. Therefore I 
>> suggest to skip this meeting unless I hear differently by the end of 
>> today,
>>
>> Greetings,
>>
>> Anselm
>>
>>
>> Anselm Vossen, Assistant Professor
>> Department of Physics, Duke University
>> Box 90305, Durham, NC, 27708-0305
>> office: 188 Physics
>> tel: (919) 660-7593
>> cell: (217) 819-6176
>> anselm.vossen at duke.edu <mailto:anselm.vossen at duke.edu>
>>
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>>
>
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-- 
====================================================

Marco Radici

INFN - Sezione di Pavia
via Bassi 6
I-27100 Pavia
Italy

tel. +39 0382 987451
fax  +39 0382 423241

e-mail marco.radici at pv.infn.it
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