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Search for anomalous interaction mean free paths of charge, 2≦Z≦18 projectile fragments in emulsions exposed to 1.8 A GeV40Ar ions |
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| Authors: | S B Beri K B Bhalla R Bhanja A Bharti V S Bhatia G Claesson S Garpman S K Gupta V K Gupta N Y Herrstrom B Jakobsson R Joseph G L Kaul G Kaur M Kaur S Kitroo V Kumar S Lokanathan I Lund L K Mangotra I S Mitra S Mookerjee B Norén A Oskarsson I Otterlund Y Prakash S Persson N K Rao S Sankhyadhar S Satti M M Sherif K Söderström S K Tuli |
| Institution: | 1. Physics Department, Punjab University, Chandigarh, India 2. Physics Department, Rajasthan University, Jaipur, India 3. Physics Department, Banaras Hindu University, Varanasi, India 4. University of Lund, Lund, Sweden 5. Physics Department, Jammu University, Jammu, India |
| Abstract: | 40Ar-emulsion interactions are studied, to investigate the question of anomalons, in twoG- 5 emulsion stacks. In about 4600 primary interactions, projectile fragments of Z≧2 for all generations have been followed until they interact or leave the stack. After careful estimation of charges of these fragments, variation of their mean free paths is studied as a function of distance from the preceding interaction. Generation effect,N h dependence and production angle effect are investigated. In addition multi-chain events are analysed separately. Our results do not show anomalons at the 6% level and are consistent with non-occurrence of anomalons. However, this experiment is not sensitive enough to rule out anomalons (with a mfp of the order of 2 to 3 cm) produced at about 1% (or less) level. |
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