[Hps] [EXTERNAL] Re: [PRad] A new exclusion limit

[Stepan Stepanyan]

Hello Tim and Andrea,

The link was the correct one, yes I referred to NA64 results, and yes I know it is invisible decay search. Still thought to send as the region is close to our visible search.

Stepan

On Jul 24, 2023, at 3:56 AM, Andrea Celentano <andrea.celentano at ge.infn.it<mailto:andrea.celentano at ge.infn.it>> wrote:

Hi all,
I am one of the authors of this paper: as Tim says, this is related to the Dark Sector scenario in which the A’ decays invisibly to LDM; this model is different from the one searched for by HPS, and thus the results from NA64 do not introduce any new constraint on HPS parameters space.

Bests,
Andrea

On Jul 23, 2023, at 06:30, Nelson, Timothy Knight via Hps <hps at jlab.org<mailto:hps at jlab.org>> wrote:

Hi Stepan,

Perhaps the wrong link was sent? This paper is a missing energy search for dark matter (a la LDMX), not visibly decaying dark photons - it cannot exclude anything in the visible search parameter space. (Any visible decay will be vetoed in this search.)

Tim

On Jul 21, 2023, at 11:30 AM, Stepan Stepanyan via Hps <hps at jlab.org<mailto:hps at jlab.org>> wrote:

The new results from NA64 cuts very close to our overtaxing region!

Stepan

Begin forwarded message:

From: Rafayel Paremuzyan via PRad <prad at jlab.org<mailto:prad at jlab.org>>
Subject: [PRad] A new exclusion limit
Date: July 21, 2023 at 11:46:29 AM EDT
To: "prad at jlab.org<mailto:prad at jlab.org>" <prad at jlab.org<mailto:prad at jlab.org>>
Reply-To: Rafayel Paremuzyan <rafopar at jlab.org<mailto:rafopar at jlab.org>>

Hello all,

here is the new paper (still in the Arxiv) that reports a huge new exclusion limit
https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2307.02404&d=DwIFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=ErLkbYGWd8oSAZ70ywHxhA&m=9RKBthU7PPqHGurhmXjW8nIul8HkuUV9TjCqFfxelYt0Ecz5fF-x4YJ7zUXeJepO&s=slZj9qYPT8Sgy2hkNLSvp4dUxg4LbJrb6IhAlrmGDzA&e=

Rafo
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