Hunt for the 1/sup 1/P/sub 1/ bound state of charmonium [report]

F.C. Porter
1982 unpublished
MASTER ABSTRACT Using the Crystal Ball detector at SPEAR, we have looked for evidence of the laosoin-violatlng decay •' •* " oi ?l, where 'P, is the predicted ipln-aiaglet p~wave bound state of charntmlun. For a ! Pt state at the (indicted tuss (~35Z0 HeV), we obtain the 951 confidence level limits: 8n(t' * » OJ Pj) < 0.55Z, BR(*' * •* " PI)B1I( 1 P| -ync) < 0.1« . these linlrs are ensnared with staple theoretical predictions. (Invited talk presented at the XTO-th Rencontre de Horiond workshop
more » ... n Men Flavours, las axes, France. January 24-30, 1982.) > tank supported In part by the Department of Energy, (SUO and nfi-aC03-81EB40050 (CIT). gFinsBNWWQl nE-AC03-76SFW«5 »"'* With the observation of a candidate for tht S l Snlu^) state of oharaoulua,*' thsx* xaaalns only a single predicted ce bound atate for vhieh no evioence exlata. this ia the I'P, atate, with /" -i*". and a u» expected to be equal Co the center-of-gravity of the 3 *J(XJ) atateo, or "3520 HaV.'* Deviation* {ram thie Bass prediction mold suggest the presence of a long range spln-epin tea In the quark-antiquark potential. Here, we report on a search for the l Pj state in *' decay* using the Crystal Ball detector at the SPEAR e + e~ storage ring. The observation of the l t 1 atate in e>' decays ia cenplicatsd by the fact that both states sre odd under charge conjugation, and hence, staple radiative transitions are forbidden. The nost practising •ecuanleaa appaar to be transitions involving the emission of tvo photons: •' * rr'Bj. He nay consider four possi bilities, as illustrated is Fig. I.
doi:10.2172/5165717 fatcat:mvqzyhojwreptivt5waftupk3e