Bose-einstein Correlations of Three Charged Pions in Hadronic Z 0 Decays the Opal Collaboration the Opal Collaboration

Abstract

Bose-Einstein Correlations (BEC) of three identical charged pions were studied in 4× 106 hadronic Z0 decays recorded with the OPAL detector at LEP. The genuine three-pion correlations, corrected for the Coulomb effect, were separated from the known two-pion correlations by a new subtraction procedure. A significant genuine three-pion BEC enhancement near threshold was observed having an emitter source radius of r3 = 0.580±0.004 (stat.)±0.029 (syst.) fm and a strength of λ3 = 0.504 ± 0.010 (stat.)± 0.041 (syst.). The Coulomb correction was found to increase the λ3 value by ∼ 9% and to reduce r3 by ∼ 6%. The measured λ3 corresponds to a value of 0.707±0.014 (stat.)±0.078 (syst.) when one takes into account the three-pion sample purity. A relation between the two-pion and the three-pion source parameters is discussed. (Submitted to European Physical Journal, C) The OPAL Collaboration K. Ackerstaff8, G. Alexander23, J. Allison16, N. Altekamp5, K.J. Anderson9, S. Anderson12, S. Arcelli2, S. Asai24, S.F. Ashby1, D. Axen29, G. Azuelos18,a, A.H. Ball17, E. Barberio8, R.J. Barlow16, R. Bartoldus3, J.R. Batley5, S. Baumann3, J. Bechtluft14, T. Behnke8, K.W. Bell20, G. Bella23, S. Bentvelsen8, S. Bethke14, S. Betts15, O. Biebel14, A. Biguzzi5, S.D. Bird16, V. Blobel27, I.J. Bloodworth1, M. Bobinski10, P. Bock11, J. Böhme14, M. Boutemeur34, S. Braibant8, P. Bright-Thomas1, R.M. Brown20, H.J. Burckhart8, C. Burgard8, R. Bürgin10, P. Capiluppi2, R.K. Carnegie6, A.A. Carter13, J.R. Carter5, C.Y. Chang17, D.G. Charlton1,b, D. Chrisman4, C. Ciocca2, P.E.L. Clarke15, E. Clay15, I. Cohen23, J.E. Conboy15, O.C. Cooke8, C. Couyoumtzelis13, R.L. Coxe9, M. Cuffiani2, S. Dado22, G.M. Dallavalle2, R. Davis30, S. De Jong12, L.A. del Pozo4, A. de Roeck8, K. Desch8, B. Dienes33,d , M.S. Dixit7, M. Doucet18, J. Dubbert34, E. Duchovni26, G. Duckeck34, I.P. Duerdoth16, D. Eatough16, P.G. Estabrooks6, E. Etzion23, H.G. Evans9, F. Fabbri2, A. Fanfani2, M. Fanti2, A.A. Faust30, F. Fiedler27, M. Fierro2, H.M. Fischer3, I. Fleck8, R. Folman26, A. Fürtjes8, D.I. Futyan16, P. Gagnon7, J.W. Gary4, J. Gascon18, S.M. Gascon-Shotkin17, C. Geich-Gimbel3, T. Geralis20, G. Giacomelli2, P. Giacomelli2, V. Gibson5, W.R. Gibson13, D.M. Gingrich30,a, D. Glenzinski9, J. Goldberg22, W. Gorn4, C. Grandi2, E. Gross26, J. Grunhaus23, M. Gruwé27, G.G. Hanson12, M. Hansroul8, M. Hapke13, C.K. Hargrove7, C. Hartmann3, M. Hauschild8, C.M. Hawkes5, R. Hawkings27, R.J. Hemingway6, M. Herndon17, G. Herten10, R.D. Heuer8, M.D. Hildreth8, J.C. Hill5, S.J. Hillier1, P.R. Hobson25, A. Hocker9, R.J. Homer1, A.K. Honma28,a, D. Horváth32,c, K.R. Hossain30, R. Howard29, P. Hüntemeyer27, P. Igo-Kemenes11, D.C. Imrie25, K. Ishii24, F.R. Jacob20, A. Jawahery17, H. Jeremie18, M. Jimack1, A. Joly18, C.R. Jones5, P. Jovanovic1, T.R. Junk8, D. Karlen6, V. Kartvelishvili16, K. Kawagoe24, T. Kawamoto24, P.I. Kayal30, R.K. Keeler28, R.G. Kellogg17, B.W. Kennedy20, A. Klier26, S. Kluth8, T. Kobayashi24, M. Kobel3,e, D.S. Koetke6, T.P. Kokott3, M. Kolrep10, S. Komamiya24, R.V. Kowalewski28, T. Kress11, P. Krieger6, J. von Krogh11, P. Kyberd13, G.D. Lafferty16, D. Lanske14, J. Lauber15, S.R. Lautenschlager31, I. Lawson28, J.G. Layter4, D. Lazic22, A.M. Lee31, E. Lefebvre18, D. Lellouch26, J. Letts12, L. Levinson26, R. Liebisch11, B. List8, C. Littlewood5, A.W. Lloyd1, S.L. Lloyd13, F.K. Loebinger16, G.D. Long28, M.J. Losty7, J. Ludwig10, D. Lui12, A. Macchiolo2, A. Macpherson30, M. Mannelli8, S. Marcellini2, C. Markopoulos13, A.J. Martin13, J.P. Martin18, G. Martinez17, T. Mashimo24, P. Mättig26, W.J. McDonald30, J. McKenna29, E.A. Mckigney15, T.J. McMahon1, R.A. McPherson28, F. Meijers8, S. Menke3, F.S. Merritt9, H. Mes7, J. Meyer27, A. Michelini2, S. Mihara24, G. Mikenberg26, D.J. Miller15, R. Mir26, W. Mohr10, A. Montanari2, T. Mori24, K. Nagai26, I. Nakamura24, H.A. Neal12, B. Nellen3, R. Nisius8, S.W. O’Neale1, F.G. Oakham7, F. Odorici2, H.O. Ogren12, M.J. Oreglia9, S. Orito24, J. Pálinkás33,d , G. Pásztor32, J.R. Pater16, G.N. Patrick20, J. Patt10, R. Perez-Ochoa8, S. Petzold27, P. Pfeifenschneider14, J.E. Pilcher9, J. Pinfold30, D.E. Plane8, P. Poffenberger28, B. Poli2, J. Polok8, M. Przybycień8, C. Rembser8, H. Rick8, S. Robertson28, S.A. Robins22, N. Rodning30, J.M. Roney28, K. Roscoe16, A.M. Rossi2, Y. Rozen22, K. Runge10, O. Runolfsson8, D.R. Rust12, K. Sachs10, T. Saeki24, O. Sahr34, W.M. Sang25, E.K.G. Sarkisyan23, C. Sbarra29, A.D. Schaile34, O. Schaile34, F. Scharf3, P. Scharff-Hansen8, J. Schieck11, B. Schmitt8, S. Schmitt11, A. Schöning8, T. Schorner34, M. Schröder8, M. Schumacher3, C. Schwick8, W.G. Scott20, R. Seuster14, T.G. Shears8, B.C. Shen4, C.H. Shepherd-Themistocleous8, P. Sherwood15, G.P. Siroli2, A. Sittler27, A. Skuja17, A.M. Smith8, G.A. Snow17, R. Sobie28, S. Söldner-Rembold10, M. Sproston20, A. Stahl3, K. Stephens16, J. Steuerer27, K. Stoll10, D. Strom19, R. Ströhmer34, R. Tafirout18, S.D. Talbot1, S. Tanaka24, P. Taras18, S. Tarem22, R. Teuscher8, M. Thiergen10, M.A. Thomson8, E. von Törne3, E. Torrence8,

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@inproceedings{Ackerstaff1998BoseeinsteinCO, title={Bose-einstein Correlations of Three Charged Pions in Hadronic Z 0 Decays the Opal Collaboration the Opal Collaboration}, author={K Ackerstaff and G Alexander and J Allison and N Altekamp and K J Anderson and S Anderson and S Arcelli and S Asai and S F Ashby and D Axen and G Azuelos and A H Ball and E Barberio and R J Barlow and R Bartoldus and J R Batley and S Baumann and J Bechtluft and T Behnke and K W Bell and I J Bloodworth and M Bobinski and P Bock and J B{\"{o}hme and M Boutemeur and S Braibant and P Bright-Thomas and R M Brown and H J Burckhart and C Burgard and R B{\"{u}rgin and P Capiluppi and R K Carnegie and A A Carter and J R Carter and C Y Chang and D G Charlton and D Chrisman and C Ciocca and P E L Clarke and E Clay and I Cohen and J E Conboy and O C Cooke and C Couyoumtzelis and R L Coxe and M Cuffiani and S Dado and G M Dallavalle and R Davis and S De Jong and L A Del Pozo and A De Roeck and K Desch and B Dienes and M S Dixit and M Doucet and J Dubbert and E Duchovni and G Duckeck and I P Duerdoth and D Eatough and P G Estabrooks and E Etzion and H G Evans and F Fabbri and A Fanfani and M Fanti and A A Faust and F Fiedler and M Fierro and H M Fischer and I Fleck and R Folman and A F{\"{u}rtjes and D I Futyan and P Gagnon and J W Gary and J Gascon and S M Gascon-Shotkin and C Geich-Gimbel and T Geralis and G Giacomelli and P Giacomelli and V Gibson and W R Gibson and D M Gingrich and D Glenzinski and J Goldberg and W Gorn and C Grandi and E Gross and J Grunhaus and M Gruw{\'e} and G G Hanson and M Hansroul and M Hapke and C K Hargrove and C Hartmann and M Hauschild and C M Hawkes and R Hawkings and R J Hemingway and M Herndon and G Herten and R D Heuer and Hildreth and J C Hill and S J Hillier and P R Hobson and A Hocker and R J Homer and A K Honma and D Horv{\'a}th and K R Hossain and R Howard and P H{\"{u}ntemeyer and P Igo-Kemenes and D C Imrie and K Ishii and F R Jacob and A Jawahery and H Jeremie and M Jimack and A Joly and C R Jones and P Jovanovic and T R Junk and D Karlen and V Kartvelishvili and K Kawagoe and T Kawamoto and P I Kayal and R K Keeler and R G Kellogg and B W Kennedy and Littlewood and A W Lloyd and S L Lloyd and F K Loebinger and G D Long and M J Losty and J Ludwig and D Lui and A Macchiolo and A Macpherson and M Mannelli and S Marcellini and C Markopoulos and A J Martin and J P Martin and G Martinez and T Mashimo and P M{\"a}ttig and W J Mcdonald and J Mckenna and E A Mckigney and T J Mcmahon and R A Mcpherson and F Meijers and S Menke and F S Merritt and H Mes and J Meyer and A Michelini and S Mihara and G Mikenberg and D J Miller and R Mir and W Mohr and A Montanari and T Mori and K Nagai and I Nakamura and H A Neal and B Nellen and R Nisius and S W O 'neale and F G Oakham and F Odorici and H O Ogren and M J Oreglia and S Orito and J P{\'a}link{\'a}s and G P{\'a}sztor and J R Pater and G N Patrick and J Patt and R Perez-Ochoa and S Petzold and P Pfeifenschneider and J E Pilcher and J Pinfold and D E Plane and P Poffenberger and B Poli and J Polok and M Przybycie´n and C Rembser and H Rick and S Robertson and S A Robins and N Rodning and J M Roney and K Roscoe and A M Rossi and Y Rozen and K Runge and O Runolfsson and D R Rust and K Sachs and T Saeki and O Sahr and W M Sang and E K G Sarkisyan and C Sbarra and A D Schaile and O Schaile and F Scharf and P Scharff-Hansen and J Schieck and B Schmitt and S Schmitt and A Sch{\"{o}ning and T Schorner and M Schr{\"{o}der and M Schumacher and C Schwick and W G Scott and R Seuster and T G Shears and B C Shen and C H Shepherd-Themistocleous and P Sherwood and G P Siroli and A Sittler and A Skuja and A M Smith and G A Snow and R Sobie and S S{\"{o}ldner-Rembold and M Sproston and A Stahl and K Stephens and S Turcot and M F Turner-Watson and R Van Kooten and P Vannerem and M Verzocchi and P Vikas and H Voss and F W{\"a}ckerle and A Wagner and C P Ward and D R Ward and P M Watkins and A T Watson and N K Watson and P S Wells and N Wermes and J S White and G W Wilson and J A Wilson and T R Wyatt and S Yamashita and G Yekutieli and V Zacek and D Zer-Zion}, year={1998} }