1. 50th Anniversary of the Particle Data Group Also celebrating the 75 th Birthday of Matts Roos 80 th Birthday of Art Rosenfeld

2. Sheldon Glashow George Kalbfleisch Art Rosenfeld

3. PDG Group Leaders (Berkeley) Art Rosenfeld Bob Kelly (1973) Tom Trippe (1970) Michael Barnett Early PDG members Lina Galtieri (1963) Charles Wohl (1967) Betty Armstrong (1971) Jane Kingston Tom Lasinski (1970) David Richards Leader of the HEPDATA Reaction Data Database at Durham Mike Whalley CERN Group Leader Michael Doser Japan Group Leader Ken-ichi Hikasa Meson Team Leader Matts Roos

4. Comparing masses 50 years ago and now

5. Comparing mean lives 50 years ago and now

6. Entire section was one page

7. Section is 120 pages

8. 2006 Edition of RPP 689 New papers 2633 New measurements -- with new fits In addition to 6400 old papers with 22,000 measurements 110 Reviews 11 new reviews 66 revised Book is 1250 pages Booklet is 320 pages

9. 31,000 Booklets 16,000 RPP books 5-10 million hits/year on website Products Distributed

10. Student and HEP Books/Booklets (LBNL distribution) Booklet: yeartotalHEP[%] student[%]grad. fract.[%] 2000 8,968 57 2774 200210,083 56 3372 200411,258 56 3970 RPP Book: yeartotalHEP[%]student[%]grad. fract.[%] 2000 6,669 63 2478 2002 8,220 61 3176 2004 9,328 63 3875

11. 166 authors from 19 countries and 100 institutions PDG/Berkeley CERN, Japan, Meson Team, World Working Groups, Workshop participants, Referees, Verifiers Who Contributes

12. The PDG Empire

13. Number of Measurements by Particle

14. Confidence Levels Each point is one average. a) Peaks at left due to conflicting measurements. b) Broad peaks at right due to conservative error bars. a) b)

15. The Web allows us to see which portions of RPP most interest our readers. In practice, the hits on the Data Listings and on the Reviews are almost exactly equal. Clearly people care about both. Listings and Reviews

16. Public Access to the RPP Database A unique, valuable, convenient access to information in our database. And it is fun to explore!

19. According to SLAC Library, the Review is the all-time top cited article in High Energy Physics with citations. According to SLAC Library, the Review is the all-time top cited article in High Energy Physics with 25,800 citations. 2nd is Weinberg’s Standard Model paper with 6075

20. Survey on Big Book December 2000 THE QUESTION: Is having a copy of the full-sized book essential to your work or study? Yes, it is essential. Having the full-size book is useful, but I could live without it. No, I do not need it. 2450 TOTAL Responses 2450. 1226 also provided comments

21. Survey on Big Book COMMENT Many of the people who voted "useful" made comments urging continuance of the full-sized book.

22. Survey on Big Book

23. Wild predictions for 50 years from now Fifty years is a long time in any scientific field. The last fifty years have changed particle physics beyond recognition. 1.We may not be here. 2.The theories cannot be conceived today (although extra dimensions go back more than 50 years). 3.The computational power will be beyond our wildest dreams. 4.The field may be non-accelerator based. 5.If we start thinking now, maybe we can think of a good name for our field!