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Workshop On

Hyperon-Hyperon Interactions and

Searches for Exotic Di-Hyperons in Nuclear Collisions

Co-sponsored by STAR


At this workshop we aim to bring together the heavy ion and hyperon physics communities to explore new physics opportunities arising from a large number of multiple hyperons produced in heavy ion collisions. In heavy ion collisions many hyperons (Lambda, Xi, Omega and their anti-particles) are produced in each collision as a result of coalescence or recombination processes from strangeness equilibrated dense partonic matter. This provides a unique opportunity to study hyperon-hyperon interactions through their correlations in heavy ion collisions. The investigation of multi-strangeness hyperon-hyperon interactions with high statistics is not feasible in any other laboratory settings. This is a potentially very rich physics area that the heavy ion community has not fully explored yet. For example, the STAR experiment can reconstruct more than several tens of thousands of Lambda-Lambda pairs, nearly ten thousand Xi-Xi pairs and a sizable number of Omega-Omega pairs from TPC data in one year of Au+Au running. A large data volume of hyperon samples is also expected from the ALICE experiment at LHC. Such a large amount of hyperon pairs will also provide unprecedented sensitivity on exotic di-hyperon searches.

Our program will cover both recent theoretical progress and experimental results.
We envision talks from the perspectives:

Hyperon physics in heavy ion collisions is a promising and so far underutilized opportunity at RHIC. It could add an important dimension to the RHIC scientific portfolio in this decade. Recent results including the discovery of antimatter hypertriton at RHIC in 2010, the continuous accumulation of hypertriton sample and the measurement of Lambda-Lambda correlation function have already demonstrated the vitality of such a research program.


Presentations will be mainly by invitation. We expect to be able to accommodate a limited number of contributed talks. If you are interested in presenting a contributed talk, please contact one of the organizers.

Proceedings Information for Speakers

All speakers are to submit a 6-page Proceedings Package consisting of:

The Proceedings Package must be submitted prior to or during the workshop. A paper copy is preferable; however, an electronic copy may be submitted to pesposit@bnl.gov. Please avoid using color since the proceedings are printed in black and white.

Your cooperation is appreciated for timely publication of the proceedings after the workshop. Any questions contact the event coordinator at 631-344-5864 or pesposit@bnl.gov.

Special Evening Event

Registered attendees are invited to attend the optional banquet dinner after the Workshop on Thursday, March 1, 2012 at 6:00 pm, Brookhaven Center South Room; free of charge for registered participants.


Please note, it is your responsibility to reserve your own accommodations. Limited on-site housing is available which will be assigned on a first-come, first-served basis. Transportation from area hotels is not provided by BNL. There is no public transportation to BNL. Attendees are strongly advised to make car rental arrangements prior to arrival.

If you require financial assistance for on-site housing, please contact the event coordinator. More...

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Last Modified: December 5, 2011