Dear Colleagues,

Thank you very much for accepting to participate in the Fortieth Anniversary International Workshop on Nuclear Theory IWNT40-2023. On the web page of the Workshop you can see the list of colleagues, who have confirmed their participation. We are expecting to receive few unsent abstracts till 18-th of June 2023 in order to include them in a booklet and to organize the programme. Abstracts received after that date can not be included in the booklet.

Below please find the most important information about the Workshop. (POSTER)

Rila Mountain is located about 70 km south from Sofia. It is the highest massif on the Balkan Peninsula (Mt. Mussala 2925 m), a national park with preserved nature.

The Workshop will take place in a four-stars Hotel Lion Borovetz, which is located in one of the most beautiful and peaceful spots of Borovetz resort, very close to the Ice Fountains and the main ski lift station. Borovetz is the first and most popular international mountain resort in Bulgaria. It is located at 1300 m above sea level on the Northern slopes of Rila mountain. Borovetz is easily accessible, being only 70 km away from Sofia. It was developed into a modern high-class ski resort with luxury hotels, restaurants, entertainment spots and 50 km of ski runs providing excellent conditions for a variety of winter sports.
Address: Lion Hotel Borovetz, 2010 Borovetz Resort, Sofia region, Bulgaria.
Internet in common areas of the hotel is available.

In early July one can expect mild and sunny days and cool nights. However, rain is not excluded.

Formal letters of invitation to help with visa applications can be sent upon request to the Organizing Committee at If you need such a letter please specify/provide all details that have to be included in the letter.

Transfer to the Workshop site: A bus transportation from Sofia to Hotel Lion Borovetz is scheduled at 6.00 p.m. on Sunday, 2 July, from the parking lot in front of the former Pliska Hotel - Sofia, Blvd. "Tsarigradsko chausse" 87. The return trip to Sofia is scheduled on Saturday morning, 8 July, starting at 9.30 a.m. from Hotel Lion Borovetz.
Airport transfer: The meeting point Pliska Hotel can be reached by the public transportation bus line 84 from Terminal 2 of the Airport. The trip to Pliska Hotel takes about 20-25 minutes. Tickets are available from the bus driver. The price of the ticket is 2 BGN (Levs) which is 1 EUR. Alternatively a taxi can be used.

Scientific program
Sessions and discussions will be held mornings and afternoons from Monday (3 July) to Friday (7 July), except for Thursday (6 July) afternoon (excursion half-day). The length of the talks is planned to be 30 mins (including discussion). Small changes in the length are possible in dependence on the overall loading of the programme. The conference room is equipped with a beamer and an overhead projector. WiFi internet connection is also available in the room. The schedule of the talks and posters will be distributed shortly before the beginning of the Workshop. If you plan to come later or leave the Workshop earlier please inform us by 18-th of June in order to take this into account in the program.

The Proceedings of the workshop will be published by the end of the year and we will be expecting your contributions not later than the end of September 2023. Instructions for their preparation and submission will be given after the Workshop.

If you have any special food preferences (meat-eater, vegetarian, or vegan) please inform us in advance.

We will expect to receive information about your arrival and departure times. If you arrive earlier or depart later than the days of travel to the conference site, please, let us know. We could help you with a hotel reservation in Sofia, if you need one. If you need any further help to organize your visit to Bulgaria, please do not hesitate to contact us.

Important dates:

  • deadline for including abstracts in the booklet: 18 June
  • arrival day: 2 July (Sunday)
  • opening: 3 July (Monday)
  • closing: 7 July (Friday)
  • departure: 8 July (Saturday)
  • deadline for receiving contribution papers: 30 September 2023

Workshop's web page:

E-mail address for correspondence:

We are looking forward to meeting you in Sofia.

With best regards,

M. Gaidarov

N. Minkov