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<span style="margin:0px;font-size:12pt;font-family:Calibri, Arial, Helvetica, sans-serif;color:black;background-color:rgb(255, 255, 255)"><span style="margin:0px;font-family:"Calibri Light", "Helvetica Light", sans-serif">         Dear Collaborators:</span></span>

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<div style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">We are glad to announce the 19th International Conference on Hadron Spectroscopy

 and Structure (HADRON 2021). It will be hosted by the National Autonomous University of Mexico (UNAM) with support from various Mexican Institutions, and held </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><span dir="ltr" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">on

 July 26-31, 2021</span></span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">.</span><span lang="en-US" style="margin:0px"></span></div>

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</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">It is planned to be held virtually using ZOOM. The sessions are being organized in a reduced time setup but extended over six days, to allow

 colleagues from all around the world to follow most of the conference. The various sessions will be spanned </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><span dir="ltr" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">from

 7am to 1pm </span></span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">(Mexico City time).</span><span lang="en-US" style="margin:0px"></span></div>

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</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">The scientific program includes the latest developments on the following topics: </span><span lang="en-US" style="margin:0px"></span></div>

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<li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Meson spectroscopy </span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Baryon spectroscopy </span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Exotic hadrons and candidates </span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Hadron decays, production and interactions</span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Analysis tools </span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">QCD and hadron structure </span></li><li style="font-size:11pt;font-family:Calibri, sans-serif;margin:0px"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Hadrons in hot and nuclear environment including hypernuclei </span><span lang="en-US" style="margin:0px"></span></li></ul>

<div style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">The list of plenary speakers is available on the webpage of the event: </span><span style="margin:0px"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Furldefense.proofpoint.com-252Fv2-252Furl-253Fu-253Dhttps-2D3A-5F-5Fnam10.safelinks.protection.outlook.com-5F-2D3Furl-2D3Dhttps-2D253A-2D252F-2D252Furldefense.proofpoint.com-2D252Fv2-2D252Furl-2D253Fu-2D253Dhttp-2D2D3A-2D5F-2D5Fwww.nucleares.unam.mx-2D5Fhadron2021-2D2526d-2D253DDwMFAw-2D2526c-2D253DCJqEzB1piLOyyvZjb8YUQw-2D2526r-2D253DcT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw-2D2526m-2D253DfU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0-2D2526s-2D253DgeXoM2cnCfCLh77VE071V47y5Ou83IgHGPbb3x7tHqM-2D2526e-2D253D-2D26data-2D3D04-2D257C01-2D257C-2D257C412b0a15bade4351b99908d9280989da-2D257C17f1a87e2a254eaab9df9d439034b080-2D257C0-2D257C0-2D257C637584843697840085-2D257CUnknown-2D257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-2D253D-2D257C1000-2D26sdata-2D3Dks9ulBX41BLw1izEfRzBj-2D252BGmNojw0wWuSFnrYPLc-2D252FVg-2D253D-2D26reserved-2D3D0-2526d-253DDwMFAw-2526c-253DCJqEzB1piLOyyvZjb8YUQw-2526r-253DnhU86tu-5FxVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI-2526m-253D0Mh7VU0KkigRzCYyCjvxCpUeaPkCS82FBh1WJPM59tE-2526s-253DdAHhpG6NabJVOa8FJPDrDQRrA9js0mKZ5ax07nnMqDk-2526e-253D-26data-3D04-257C01-257C-257Cd12d80ba8d764a0ba83908d9283ca00b-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637585063126806398-257CUnknown-257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-253D-257C1000-26sdata-3D9AInNb1OqszH4pRRhyj2-252FgtUg9BRkUJKlgLRL3N8L1I-253D-26reserved-3D0&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=nhU86tu_xVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI&m=81ChpS3hMtg5G8phyiglxRq-3br8Wsxzo7yI0USMM4o&s=0SOlV8zRQHOPPPVwBTAnJ7HfSmNNjh-i1x-Q-gL86z0&e=" target="_blank" rel="noopener noreferrer" data-auth="VerificationFailed" originalsrc="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.nucleares.unam.mx_hadron2021&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=cT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw&m=fU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0&s=geXoM2cnCfCLh77VE071V47y5Ou83IgHGPbb3x7tHqM&e=" shash="NVRyAaxwpptjKwGjoSJt9e1W+3JUX1mcrG2o6mRWTRsWpUnao10NhLilEqaqabkEr8k2efWJdgndvj5+zLE5PGWXtOwC2TAY7SMt00vKQfD+cPbHFL0+vxsTRqIfj+jJcdVoRd7bfW1tSdHW4lH/MW7zogxH+1Zf/p9xaQZGMus=" title="" data-linkindex="0" style="margin:0px;color:rgb(5, 99, 193)"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">www.nucleares.unam.mx/hadron2021</span></a></span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">. </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><span style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">The

abstract submission is now open for parallel sessions <span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">(<span style="margin:0px"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Furldefense.proofpoint.com-252Fv2-252Furl-253Fu-253Dhttps-2D3A-5F-5Fnam10.safelinks.protection.outlook.com-5F-2D3Furl-2D3Dhttps-2D253A-2D252F-2D252Furldefense.proofpoint.com-2D252Fv2-2D252Furl-2D253Fu-2D253Dhttp-2D2D3A-2D5F-2D5Findico.nucleares.unam.mx-2D5Fevent-2D5F1541-2D5F-2D2526d-2D253DDwMFAw-2D2526c-2D253DCJqEzB1piLOyyvZjb8YUQw-2D2526r-2D253DcT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw-2D2526m-2D253DfU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0-2D2526s-2D253Dhwxe8ZOEm-2D2DQ2j1YaMxIC9CrgQIqDZDkc7mvJSLOsrmQ-2D2526e-2D253D-2D26data-2D3D04-2D257C01-2D257C-2D257C412b0a15bade4351b99908d9280989da-2D257C17f1a87e2a254eaab9df9d439034b080-2D257C0-2D257C0-2D257C637584843697850081-2D257CUnknown-2D257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-2D253D-2D257C1000-2D26sdata-2D3DuJMpszsCG9dUUgHyzGwbi-2D252BWSSS2ZHTqr3qU-2D252BKtVgXa8-2D253D-2D26reserved-2D3D0-2526d-253DDwMFAw-2526c-253DCJqEzB1piLOyyvZjb8YUQw-2526r-253DnhU86tu-5FxVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI-2526m-253D0Mh7VU0KkigRzCYyCjvxCpUeaPkCS82FBh1WJPM59tE-2526s-253DXBp-2DXD7jTVX7qFXTdFJ1RjLcnURT7bk47TwF9l4KoZU-2526e-253D-26data-3D04-257C01-257C-257Cd12d80ba8d764a0ba83908d9283ca00b-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637585063126806398-257CUnknown-257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-253D-257C1000-26sdata-3D4f6BIuz7DKiR-252BtyhBKUmJ-252BCnEiKRE5Jwn4YAPiloUAA-253D-26reserved-3D0&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=nhU86tu_xVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI&m=81ChpS3hMtg5G8phyiglxRq-3br8Wsxzo7yI0USMM4o&s=CsStBk9zcK9QO38q2Lp1Pi48CH0cqZwQlbR_cGcEPXw&e=" target="_blank" rel="noopener noreferrer" data-auth="VerificationFailed" originalsrc="https://urldefense.proofpoint.com/v2/url?u=http-3A__indico.nucleares.unam.mx_event_1541_&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=cT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw&m=fU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0&s=hwxe8ZOEm-Q2j1YaMxIC9CrgQIqDZDkc7mvJSLOsrmQ&e=" shash="a6b4fz0aApIL8wg+1PWkHJ4nsSvkYWhJsKU49Ge2aCU0fCaubl6QkjgbghbLxndZ04oRpNJF1e4fzeWJ28zhjTj4uqr6D5hcndtx6jjRWQ3bLd2e3opHF/sNZQcBokZUVGvU6Ph8vMYHJVoOhg8zMOdHi+6eli78Kqe065n7Ds8=" title="" data-linkindex="1" style="margin:0px;color:rgb(5, 99, 193)"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">http://indico.nucleares.unam.mx/event/1541/</a><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">).

 Round table sessions will be organized to facilitate discussions. </span><span lang="en-US" style="margin:0px"></span></div>

<div style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif"> </span></div>

<div style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Important dates</span><span lang="en-US" style="margin:0px"></span></div>

<div style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Abstract submission: </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><span dir="ltr" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">May

 1 to June 15, 2021</span></span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif"> </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><br>

</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Registration: </span><span lang="en-US" style="margin:0px;font-size:10.5pt"><span dir="ltr" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">May

 1, 2021 - July 23, 2021</span></span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif"> </span><span lang="en-US" style="margin:0px"></span></div>

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<span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Please find more information at the HADRON 2021<span style="margin:0px;font-size:10.5pt"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Furldefense.proofpoint.com-252Fv2-252Furl-253Fu-253Dhttps-2D3A-5F-5Fnam10.safelinks.protection.outlook.com-5F-2D3Furl-2D3Dhttps-2D253A-2D252F-2D252Furldefense.proofpoint.com-2D252Fv2-2D252Furl-2D253Fu-2D253Dhttp-2D2D3A-2D5F-2D5Fwww.nucleares.unam.mx-2D5Fhadron2021-2D2526d-2D253DDwMFAw-2D2526c-2D253DCJqEzB1piLOyyvZjb8YUQw-2D2526r-2D253DcT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw-2D2526m-2D253DfU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0-2D2526s-2D253DgeXoM2cnCfCLh77VE071V47y5Ou83IgHGPbb3x7tHqM-2D2526e-2D253D-2D26data-2D3D04-2D257C01-2D257C-2D257C412b0a15bade4351b99908d9280989da-2D257C17f1a87e2a254eaab9df9d439034b080-2D257C0-2D257C0-2D257C637584843697850081-2D257CUnknown-2D257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-2D253D-2D257C1000-2D26sdata-2D3D-2D252Fo1RE4ScXDCG-2D252Bea6RrrdItLfonweLxtKcilwcvqveTo-2D253D-2D26reserved-2D3D0-2526d-253DDwMFAw-2526c-253DCJqEzB1piLOyyvZjb8YUQw-2526r-253DnhU86tu-5FxVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI-2526m-253D0Mh7VU0KkigRzCYyCjvxCpUeaPkCS82FBh1WJPM59tE-2526s-253DCHZwEG-5FXn6Deo9M2WsCqz4nE5LAdI4zl96zPIwzdjRU-2526e-253D-26data-3D04-257C01-257C-257Cd12d80ba8d764a0ba83908d9283ca00b-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637585063126816395-257CUnknown-257CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0-253D-257C1000-26sdata-3Dvuv-252FplNEKgxvSw-252FFCjqD2QjuQ89P9uzKJ0jdRI8c0dk-253D-26reserved-3D0&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=nhU86tu_xVxwkH2JyhlcQb1jyw6CUjquEwQhqpV3cJI&m=81ChpS3hMtg5G8phyiglxRq-3br8Wsxzo7yI0USMM4o&s=9YfYCAm_zoeMjw6lj5UoM73-su-SehVJP-hwUggeECo&e=" target="_blank" rel="noopener noreferrer" data-auth="VerificationFailed" originalsrc="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.nucleares.unam.mx_hadron2021&d=DwMFAw&c=CJqEzB1piLOyyvZjb8YUQw&r=cT85urgHZUaHiqadfr4upyzP6oyfQ6aQ42fHUMY3Haw&m=fU5mKbAv2c96eePWuKyKAx3ABaODqDw2pJW5Xr30xV0&s=geXoM2cnCfCLh77VE071V47y5Ou83IgHGPbb3x7tHqM&e=" shash="Y19+hrTSzIB7D8ANbe4KPERD92BzUa/tgzvVTKiwRgjwx3BOCWVEAa2lLDtGco8FWllc6o/3xucidyauwQVOYbquyiqnEUpQxjMMnFEw+CTAzZJ/bftpMm3iB86QFHXswN4tS3RmLhOJAlCfdEZqffhz/IK1uMuhL3KduO2+j/I=" title="" data-linkindex="2" style="margin:0px;color:rgb(5, 99, 193)"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">webpage</a><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">.

 We look forward to seeing you virtually in HADRON2021.</span><span lang="en-US" style="margin:0px"></span></div>

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</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Aurore Courtoy</span><span lang="en-US" style="margin:0px;font-size:10.5pt"><br>

</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Cesar Fernandez-Ramirez</span><span lang="en-US" style="margin:0px;font-size:10.5pt"><br>

</span><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">Pablo Roig</span><span lang="en-US" style="margin:0px"></span></div>

<span style="margin:0px;font-size:11pt;font-family:Calibri, sans-serif"><span lang="en-US" style="margin:0px;font-size:12pt;font-family:"Calibri Light", "Helvetica Light", sans-serif">on behalf of the Local Organizing Committee</span></span></div>

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