[BDXlist] [EXTERNAL] BDX: PAC51 jeopardy presentation

[Marco Battaglieri]

Hi Andrea,
thanks for the info.
3x better stat is after the 2028 run? 2030 could be a reasonable guess 
to have 3x better upper limits?
Anyway it does not seem to question the BDX reach if we'll be able to 
deliver x100 wrt E137/old-NA64 limits
Cheers
marco

Andrea Celentano wrote:
> Hi Marco,
> thanks.
>
> NA64 plans to accumulate ~3E12 before 2025 (3x what we have now), then 
> measurements will start again in 2028, after CERN Long Shutdown.
> The expected upper limit will be ~ 3x better than what we reported on 
> the arXiv. In parallel to this, we plan a dedicated positron-beam 
> program with multiple beam energies to “scan” the A’ mass region above 
> 140 MeV.
>
> Cheers,
> Andrea
>
>> On Jul 18, 2023, at 18:46, Marco Battaglieri <battaglieri at ge.infn.it> 
>> wrote:
>>
>> Hi Andrea,
>> thanks for your comments: I'll implement them in the new version of 
>> the slides.
>> Below some more detailed answers.
>>
>> Andrea Celentano wrote:
>>> Dear Marco,
>>> the slides are to me very clear. Here are my comments.
>>>
>>>   * Slide n. 6, in top-left figure the words are mirrored?
>>>
>> it was ment to show the dierction of the beam from right to left (see 
>> the aereal picture of the acc site).
>>>
>>>   * Slide n. 8, we only considered positrons resonant annihilation.
>>>
>> corrected
>>>
>>>   * Slide n. 11, the sentence “World exclusion limits are mainly the
>>>     same as 5y ago” is to me not appropriate. The NA64 experiment
>>>     just completed a run with ~ 1E12 EOT, and the new limits are
>>>     definitively stronger than those reported in the slide
>>>     (https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2307.02404&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ru7nA6zPBSFajtw1o6aZjchIV9Cs2SBk2RiVldzQhDc&m=xy6QJhlR0eTU2hYwp1yORNiUqbho0DrxpUMZ6jBMUWQs2_2ESRvGHBDWY3Go_gdL&s=ZbAxRq-jqJ30vrVtDlD1uf8BPPest-9gRECefQ68G2U&e= ).
>>>       o These results for the moment are only on arXiv (PRL paper
>>>         was submitted one week ago), so we can probably not mention
>>>         them. However, I would remove this sentence (note that the
>>>         latest published NA64 results are from 2021 PRD letter:
>>>         https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2108.04195&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ru7nA6zPBSFajtw1o6aZjchIV9Cs2SBk2RiVldzQhDc&m=xy6QJhlR0eTU2hYwp1yORNiUqbho0DrxpUMZ6jBMUWQs2_2ESRvGHBDWY3Go_gdL&s=L4dd_6jR3GtZf42jOcIS4FlJ1vnd9NcbUk2gccHRsbo&e= , 2 years ago)
>>>
>> I was not aware of the new NA64 publication: good job! I will 
>> certainly soften the message prizing the recent result. This cen be a 
>> good stimulus to let BDX run asap!~
>> What are the NA64 plans for the near future (say within 2028?)
>> Cheers
>> Marco
>>>
>>>
>>> Bests,
>>> Andrea
>>>
>>>
>>>
>>> <PastedGraphic-1.png>
>>>
>>>> On Jul 16, 2023, at 23:44, Marco Battaglieri via BDXlist 
>>>> <bdxlist at jlab.org> wrote:
>>>>
>>>> Dear BDXers,
>>>> here in attachment the draft of PAC presentation.
>>>> Please send me your comments/suggestions by Tuesday night EDT (in 
>>>> particular language corrections).
>>>> I'd propose to have a dry run on*Wednesday July  19 at 10:00AM EDT* 
>>>> via the usual zoom link
>>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1602402962-3Fpwd-3DSGtYZTFyOVgrbEUxdHN3Z1N1SVYrUT09&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ru7nA6zPBSFajtw1o6aZjchIV9Cs2SBk2RiVldzQhDc&m=xy6QJhlR0eTU2hYwp1yORNiUqbho0DrxpUMZ6jBMUWQs2_2ESRvGHBDWY3Go_gdL&s=g4FD1qh2Nq8bai6L1epm_14Hadimx6uAyI8No8v_GFA&e= 
>>>> Talk to you in a while
>>>> cheers
>>>> Marco
>>>>
>>>> <bdx-PAC51-battaglieri.pdf>_______________________________________________
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>>>
>>
>

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