On a reciprocal basis, citizens of countries participating in the Visa Waiver Program may enter the U.S. for short-term business or tourist visits without having to obtain a B-1/B-2 visa stamp at a U.S. Embassy or Consulate. Updated information and more information regarding the program (e.g. which countries and airlines participate in the VWP; requirements on machine readable passport; proof of short stay and support) can be found on the U.S. Department of State website.
If your country does NOT participate in the Visa Waiver Program, you must obtain a valid visa stamp before entering the United States. Detailed information can be found here.
For participants who require visa to enter the US, if a invitation letter is required for the visa application, please send an email to Professor Hank Sobel (hsobel@uci.edu) with Subject Title: "Neutrino 2026 - VISA".
The following information below should be included with the request:
- First and last name (as it appears on attendee’s passport)
- Title
- Institution
- Institutional mailing address
- Talk or Poster title (if applicable)