摘要:

A Brookhaven National Laboratory‐Princeton collaboration* has searched for a stable six‐quark state in the reaction p+p→K++K++Missing Mass. Upper limits are presented for production of a narrow resonance in the mass range 2.1 to 2.4 GeV.

ISSN:0094-243X    

DOI:10.1063/1.31396

出版商:AIP    

年代:1978

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.31412

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The experimental evidence for resonant states coupled to the baryon ‐ antibaryon system is reviewed. The evidence for broad states known as the S(1963), T(2190) and U(2350) is compelling, however, there is no evidence for I=2 states and the observation of narrow states needs confirmation.

ISSN:0094-243X    

DOI:10.1063/1.31397

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The reaction p¯p&mgr;&pgr;+fX−at 6 GeV/c has been studied in a search for narrow states in the X−decays into p¯n, &pgr;−&pgr;+&pgr;−, &pgr;−K+K−, and &pgr;−p¯p. Narrow enhancements are seen at masses of 1940, 2040 and 2175 MeV. The cross sections for these enhancement are typically &sgr;&bgr;&angupr;50 nb and the widths &Ggr;≲MeV.

ISSN:0094-243X    

DOI:10.1063/1.31404

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

High statistics, high resolution (in s and t) measurements have been made of &pgr;−p elastic scattering between 1.9 and 9.5 GeV/c and of &pgr;+p between 1.9 and 6.3 GeV/c. A roughly constant angular range was covered with −0.3<cos&Vthgr;c.m.<+0.4. The data fill an important gap in existing measurements and allow sensitive tests of two theoretical models of hadronic scattering. Models with rising densities of states, such as the statistical bootstrap model predict statistical fluctuations in the cross section as &sqrt;s is changed by a typical resonance width. Such fluctuations were first investigated by Ericson in nuclear physics and have been proposed for hadronic scattering by Frautschi. Our data show significant structure that can be interpreted as Ericson fluctuations. Scaling predictions have been made based on the quark parton model that at constant angle d&sgr;/dt∝s−8. We find the measured cross sections do not conform to this prediction in detail.

ISSN:0094-243X    

DOI:10.1063/1.31410

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Results are presented on the inclusive scattering process a+p→c+X where a and c are any of &pgr;±, K±, p or p¯. The data were taken at 100 and 175 GeV/c incident momentum using the Fermilab Single Arm Spectrometer. A vertex detector was also used to measure the associated charged multiplicity. The x dependences of the inclusive cross section exhibit the power law behavior expected from various fragmentation models.

ISSN:0094-243X    

DOI:10.1063/1.31411

出版商:AIP    

年代:1978

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.31414

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

The mass spectrum of dimuons produced by 400 GeV/c protons in Tungsten has been measured for masses greater than 7 GeV. A clear resonant signal of 2700 upsilons has been seen. The dependence of dimuon production on xFand pThas been determined for dimuon masses in the range 7.0 to 8.25 GeV as well as for masses in the upsilon region 8.25 to 9.75 GeV.

ISSN:0094-243X    

DOI:10.1063/1.31413

出版商:AIP    

年代:1978

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.31388

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Recent results of an experiment studying large transverse momentum phenomena at the ISR are reviewed. Data relevant to dielectron studies have yielded cross sections for the T(9.5), possible association of the J/&psgr; with production ofx(3.5), and a stringent upper limit for direct &ggr; production. In addition, azimuthal correlations of high transverse momentum &pgr;° pairs have been investigated.

ISSN:0094-243X    

DOI:10.1063/1.31389

出版商:AIP    

年代:1978

数据来源: AIP