[Eic-exclusive] [EXTERNAL] N->N* grav ff

[Maxim Polyakov]

Dear Colleagues,

we discussed today with Asli her talk. There was a question
about the work of Oezdem and Azizi

https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_pdf_1912.06375.pdf&d=DwIBaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=AuqPVKnsEOgeRWAaMMLgHpZcS5k6fPv4Bx7HgTTr4WE&m=UOwzjbNEMJ1cL4M5LdXyh4naPNrsMe97FcFdRd_ibYU&s=CMsLGYayBbJ6tH1TEYxuwBN4RnzJZDrlv1W39uhLyvk&e= 

Unfortunately in this paper the basic equations are not correct.
The very definition of transition grav ff (eq 4 of that paper) is not
correct!
1) The full EMT is not conserved
2) it seems the P-parity is violated

Please keep this in mind if you are going to use their results.
I asked Asli to insert to YR the set of (old) refs for definitions of
transition GPDs (and hence GFFs) .

All the best, Maxim
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