In Helsinki, 12 March 2012 1 INVITATION You are cordially invited to attend the lecture presented by professor Paul Hoyer, Forty-five fascinating years in physics upon his retirement from the University of Helsinki. The lecture will take place on Wednesday 3 April 2013 at 14:00 in Auditorium D101 Department of Physics, Gustaf Hällströmin katu 2, 00560 Helsinki. Coffee and tea will be served after the lecture. Professor Juhani Keinonen Head of the Department of Physics Paul Hoyer 45 years Fysiikan laitos PL 64 (Gustaf Hällströmin katu 2), 00014 Helsingin yliopisto Matemaattis-luonnontieteellinen tiedekunta Puhelin (09) 191 50600, faksi (09) 191 50610, www.physics.helsinki.fi/~fyl_www/ Institutionen för fysik PB 64 (Gustaf Hällströms gata 2), FI-00014 Helsingfors universitet Matematisk-naturvetenskapliga fakulteten Telefon +358 9 191 50600, fax +358 9 191 50610, www.physics.helsinki.fi/~fyl_www/ Department of Physics P.O. Box 64 (Gustaf Hällströmin katu 2), FI-00014 University of Helsinki Faculty of Science Telephone +358 9 191 50600, fax +358 9 191 50610, www.physics.helsinki.fi/~fyl_www/ 2 Forty-five fascinating years in physics Retirement lecture 3 April 2013 Paul Hoyer University of Helsinki My career: HU reform Birth U studiesMSc PhD Prof FIN Nordita→ CERN Retirement I I I I I I I I I 45 64 68 73 81 91 94 02 13 1/3 2/3 x/3 Paul Hoyer 45 years A brief history of particle physics 3 U studies 64 I Quarks are postulated MScQuantum68 I Quarks Chromodynamics: are found at Yang-Mills SLAC theory for SU(3)c Single quark flavor: PhD 73 I Standard Model (SM) is postulated = ψ¯(iγµ m)ψ 1tr(G G µν) L Dµ − − 2 µν Gluons are found at DESY I composite spinor for color-3 quarks of mass m Prof 81 W and Z are found qatred CERN ψ = q green I q HU reform 91 LEP confirms SM, predictsblue top quark mass → FIN CERNGauge-covariantI derivative: mtop 94 Top quark is found at Fermilab 338 500 = I ∂ + igB Electroweakmel theory! tests: CKM paradigm Dµ µ µ I gNordita :02 strong coupling; Bµ:3 3 matrix in color space formed " × 1 " from 8 gluonSM mechanism fields Bµ and for SU(3) c generators 2λ ... Chris Quigg (FNAL) Potential Discoveries at the LHC Spaatind 2012 3–6.1.2012 9 / 130 CP violation confirmed · Retirement 13 I Higgs boson discovered at LHC: SM complete. Chris Quigg (FNAL) Potential Discoveries at the LHC Spaatind 2012 3–6.1.2012 56 / 130 · Paul Hoyer 45 years Awakening interest in physics: 1961-64 4 Importance of popular texts Kimmo Pietiläinen: Terra Cognita publishing Frank Close Kari Enqvist Jukka Maalampi ... Importance of school - university contacts Electrons moving faster than light. Experienced at the Triga FiR 1 nuclear reactor in Otaniemi (1963). Paul Hoyer 45 years 5 University studies: 1964-68 First choice for university studies in 1964: Technical physics at TKK • TKK was innovative, visible • Challenging “elimination course” • Engineering was/is a “real” profession Change of studies in 1966: Theoretical physics at HU • Theory >> technology (for me) • Successful studies at TKK • Study line of theoretical physics at HU (1961) Paul Hoyer 45 years 6 1968 A very special year... FILOSOFISKA FAKULTETEN VID ... which did not affect my studies... HELSINGFORS UNIVERSITET Kandidaten i naturvetenskaperna p a u l G u s t a v H o y e r som utdimitterats från svensk språkigt läroverk, har för vinnande av filosofie kand idatgrad terminen 19 - avlagt godkänt prov Pekka Tarjanne Pekka i - språket, ett den 24 oktober 1968 med vitsordet eximia cum laude approbatur bedömt skrivprov pro gradu teoretisk fysik .. på svenska, ävensom nedannämnda kunskapsprov: huvudämnet teoretisk fysik laudatur (utmärkta ins ikter ) biämnena matematik cum laude approbatur (~tmärkta in- sikter) fysik MScapprobatur På grund härav har genom i dag avkunnat offent Iigt utslag Paul Gustav Hoyer vunnit filosofie kandidatgrad, varöver detta honom , filosofie kandidaten Hoyer som bevis meddelas. Helsingfors, den 24 oktober På Fiz. fakultete s vägnar: ./ A~.-:-c_ • Ernst Palmen Vittnesböre _",amen. Lösen 1,50 mk 12004-68/22 Paul Hoyer 45 years ~~--------------------~---- 7 1968 ... but did affect my life. Thanks for your crucial support during 45 years! Ulla Kankkonen Paul Hoyer 45 years The 12 “Postdoc” years: 1969-81 8 Institutes Homes I U studies 64 I 68 HU Svinhufvudintie I MSc 68 I 69 Rue Cavour I CERN PhD 73 Avenue de Vaudagne Chan Hong-Mo I 71 Thesis adviser Pulker Close 1969 – 73 I Oxford Prof 81 I 73 Svinhufvudintie Stony Cedar Dr Brook Cedar Dr I HU reform I 91 75 FIN→CERN 94 I Berkeley Francisco St. Francisco St. I Siv 1973 77 I Nordita 02 Kronebakken Nordita Kaplevej Kanslergade Classensgade Patrik 1975 I Retirement13 I 81 Rantatöyry Paul Hoyer 45 years 9 My PhD Thesis Adviser Chan Hong-Mo and Tsou Sheung Tsun Paul Hoyer 45 years Photo by Keijo Kajantie 10 Ordinary Professor in Elementary Particle Physics 1981 The position was announced as a three-line notice in Finnish newspapers. The procedures were strictly regulated and very transparent. Sen jälkeen kun alkeishiukkasfysiikan varsinaisen professorin viran haltija professori K. V. Laurikainen oli anonut eroa virastaan siirtyäkseen täysinpalvelleena eläkkeelle 1.2.1979 lukien, julistettiin virka haettavaksi 4.12.1978 mennessä. Virkaa hakivat... Helmikuun 14. päivänä 1980 pidetyssä matemaattis-luonnontieteellisen osaston kokouksessa avattiin saapuneet asiantuntijanlausunnot. YLIOPISTO Osasto totesi, että... Helsingin yliopiston tiedotuslehti Tasavallan Presidentti nimitti 28.11.1980 tapahtuneessa esittelyssä Vsk 29 n:o 27 D 2.10.1981 Helsingin yliopiston kanslerin esityksestä dosentti Paul Gustav Hoyerin Helsingin yliopiston alkeishiukkasfysiikan varsinaisen professorin virkaan 1.12.1980 lukien. Only Finnish applicants were expected. The strict procedures limited the possibilities to influence the result, decreasing the risk for “inbreeding”. It also made the outcome difficult to predict. Alkeishiukkasfysiikan professori Paul Hoytr (vas.) ja patologisen anatomian ruotsinkielinen professori Leif PaulAndersson Hoyer astuivat virkaansa 45 years 23.9. - Siv u S. • Emer. prof. Göran von Bonsdorff: Positiiviset aloitteet vievät asioita eteenpäin ............................ s. 3 • Ota nuori työpaikallesi ........ ................. .................. s. 8 • Tullaan tutuiksi -palstalla eläintenhoitaja Raili Savolainen ............. ........ ........ ........ s. 13 • Tapahtumakalenteri ................. ............................. s. 15 11 1832 Department of Physics Developments at HU 1960-96 16 ... Avainhenkil(Info from¨oni 1958-1962: Claus Montonen) 1960 I Prof. K. V. Laurikainen YFL Theoretical physics study line. YLT TFT = Research Institute for Theoretical Physics Collaboration with CERN starts (ad hoc) 70 I TFL = Department of Theoretical Physics YFL → SEFL YLT → FLT (name changes) 80 I K. V. Laurikainen SEFL joins UA1Gustaf and J ¨aDelphirnefelt tcollaborations¨ahtitiede 1901-1988 at CERN K.V.Laurikainen ydinfysiikka 1916-1997 Nimitys 1960, rakensi teoreettisen fysiikan, TFTn (+Jauho, Palmen, Nevanlinna, Linkomies), ko- keellisen hiukkasfysiikan, laskentatston,.. 90 I University reforms SEFL → JSEFL¨a¨ahluento + SEFT 1979 ”kolkko(split tilaisuus) ”; halusi arvos- Finland becomes member state of CERNtusta (and filosofiastaan, EU) ei aloitteistaan I SEFL + TFL → FL TFT + SEFT → HIP (mergers) Paul96 Hoyer 45 years 12 Recruitment matters The most important element at a university is its human resource. Basic research and personnel commitments, are long-range (for me, 32 years) Active recruitment of researchers is required. Once hired, researchers should be trusted and supported. The present system of research funding is inefficient The administration of many small grants means massive bureaucracy. Paul Hoyer 45 years Persons matter 13 Thanks to Liisa for the photos! Keijo (1984) Pipsa, Liisa and Maila (1980) Paul Hoyer 45 yearsSEFL UA1 team (1984) Jorma (1992) My brilliant PhD students 14 Mikko Vänttinen Mikko Samu Kurki Matti Järvinen Paul Hoyer 45 years NORDISK INSTITUT FOR TEORETISK FYSIK 15 NORDITA DANMARK • FINLAND • ISLAND • NORGE • SVERIGE BLEGDAMSVEJ 17 TELEFON TELEFAX EMAIL DK – 2100 KØBENHAVN Ø • DANMARK Copenhagen(+45) 3532 5500 was a world(+45) 3138 physics 9157 [email protected] 1930-60. CERN theory group was in Copenhagen 1952-57 Nordita was established 1957. The premises were provided by the Danish state. PRESSEMEDDELELSE Nordisk Institut for Teoretisk Fysik - 40 År Persons involved included Niels Bohr, TorstenNORDITA, Gustafsson det nordiske and institut Tage forErlander teoretisk. fysik, fejrer 40 års jubilæum den 3 - 4 november 1997. Nuclear physics was sensitive after WW II: § 1 IStk. jubilæet 1. Nordisk deltager institut generalsekretæren for teoretisk fysik -Nordita- for Nordisk har til formålMinisterråd, at fremme Søren Christensen, samarbejdetrepræsentanter mellem de for nordiske nordiske lande forsknings inden for denministerier grundlæggende og forskningsråd forskning i samt fremtrædende fysikere fra Norden, Baltikum, Europa, USA og Asien. teoretisk fysik. Nordita skal ikke befatte sig med virksomhed, der tjener militære formål.I programmet Arbejdsresultaterne indgår skalforedrag offentliggøres og drøftelser eller på somanden belyser måde blive anvendelsen gjort af den almentteoretiske tilgængelige. fysiks metoder på andre områder, globaliseringen af det videnskabelige forskningssamarbejde samt samarbejdet indenfor forskeruddannelser. The first Finnish Board members were PekkaFor yderligere Jauho andinformation Rolf Nevanlinna og program,. kontakt venligst administrationschef Helle