[Jpac_lectures] follow up on alpha at large t

[Mathieu, Vincent]

Viktor,

about the saturation of the trajectory at large t, you can look at

for the rho trajectory:
Fig 8 in https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321378904121-3Fvia-253Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=nd227MpXJ23EwbGQALBrCbmwWyZzucQuEG7vIKAg2p8&e= <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321378904121-3Fvia-3Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=oNIOXavKMBN-DdP72RGeCQKSwy5ajeMAzuOWUzUYvZg&e= >

for the rho and a2 trajectory
Fig. 9 in https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321378904133-3Fvia-253Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=mq7P4g459iPPwOUB_vg6SKTMLZEYN33Pfe7VinVIeLA&e= <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321378904133-3Fvia-3Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=FMSuHu523zm0fvsOIZHomZGQ5bCcYI_yExNTzz3y5Lc&e= >
Fig 2 in https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_prl_pdf_10.1103_PhysRevLett.41.1260&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=a2j_bzsai0BdRGgwGglkiJ3JgsvP7eo9Li858EGMwY8&e= 

One can see that the trajectories saturate at large t

For the K* and nucleon trajectory, a similar study was done in
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321381902649-3Fvia-253Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=5319Mzj4FRyK_OXSt0NsELNayRBHU7mxgZmgaCGIyB0&e= <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sciencedirect.com_science_article_pii_0550321381902649-3Fvia-3Dihub&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=CvbJayZQBYgScyPY1eGvzjMM8WTwrES8av-H1c3QR5g&m=ZWkLeLrvfE-ZgwI49-uVcmh8DdufFtk5aX5bXCiXXsU&s=MzEeIZOn7VtBcsQg-VzSMRnSE5mUxiF8m9tssrKCSkw&e= >
but not at large t. For |t| < 1 the trajectories are linear.

I attach also two slides for my talk at ATHOS where I discussed that topic.

I’d be happy to see similar results by CLAS you mentioned.

- Vincent

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