[Triumf-seminars] TRIUMF Seminar today at 14:00

postmaster@admin.triumf.ca postmaster@admin.triumf.ca
Fri, 30 Apr 2004 09:10:16 -0700


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Date/Time: Fri 2004-04-30 at 14:00

Location:  Auditorium          

Speaker:   Andy Miller (TRIUMF)

Title:     Furious Fuss about Five Quarks

Abstract: The discovery last year of the first baryon with positive strangeness, and hence an irreducible five-quark structure, threatens to become the "Helen of Hadrons", in analogy to what John Ellis christened the "Helen of Spin" --- the EMC "spin crisis" paper of 1989, which launched a thousand theoretical "explanations" and became the most highly cited paper in nuclear and particle physics. The amazingly narrow S=+1 pentaquark resonance has now been confirmed by about a dozen experiments, but recent observations of other types of narrow pentaquark resonances have been met with other contradictory evidence. The confusing situation will be reviewed.

Stimulants available 15 minutes before the talk.

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