122605004
Clan structure and intermittency in proton-nucleus interactions at high energy
In this paper we examine the similarity between clan structure and self-similar cascading in high energy proton-nucleus interactions at 70 GeV/c in emulsion. The investigation shows that the negative bionomial fitting parameterk can be used for the evaluation of factorial moments in intermittency studies and that these exhibit similar behaviour with those derived from nonstatistical procedure. The results of our study signify compatibility between clan cascading and self-similar cascading in soft hadroization processes.
121452244
Evidence of multifractality and constant specific heat in hadronic collisions at high energies
62801062
Signature of void probability scaling in high energy hadronic interactions
The rapidity gap probability in the p-AgBr interactions at 2.00 GeV/c and π-AgBr interactions at 200 and 350 GeV/c have been studied in detail. The data indicate scaling behaviour of the void probability in the central rapidity domain, which hints the validity of the linked-pair approximation for the N-particle cumulant correlation function.
121997520
Quantum solitons in a linear chain
SummaryThe properties of quantum solitons in a linear chain are studied here when a soliton (massive thirring fermion) is quantized stochastically. It is shown that quantum solitons interact with a potential of the form exp [—2mR], whereR is the interdistance of the solitons.
118027237
Dual-parton model and the high-energy pion-nucleon scattering in the forward and backward regions
SummaryOn the basis of the dynamical dual-parton model of strong interactions as discussed in an earlier paper, we study here the high-energy processes π±p→π±p, π−p→nπ0 in the forward and backward regions. To incorporate the concept of duality, it is assumed that any two spin-1/2 pointlike constituents (partons) can form a π-meson cluster in the structure of a nucleon and the basic interaction involved in MB scattering is the interaction of the incident meson with the π-meson in the structure of the nucleon. To calculate the amplitudes for the relevant processes, we also take into account a factor corresponding to the structural re-arrangement of partons involved in duality diagrams. The differential cross-sections as well as the energy dependence are found to be in excellent agreement with the experimental data. Also, this model can nicely explain the fact that all these processes in the forward regions are characterized by dips in differential cross-sections, but in the backward region, though the processes π+p→pπ+, π−p→nπ0 are characterized by dips, no such dip occurs in the process π−p→pπ−.RiassuntoSulla base del modello dinamico del partone duale per le interazione forti, come discusso in un precedente lavoro, si studiano i processi di alta energia π±p→π±p, π−p→nπ0 nella regione in avanti e in quella all’indietro. Per comprendere il concetto di dualità, si è supposto che ogni due costituenti (partoni) puntiformi di spin 1/2 possano formare un ammasso di mesoni π nella struttura di un nucleone e l’interazione di base inclusa nello scattering MB sia l’interazione del mesone incidente col mesone π nella struttura del nucleone. Per calcolare le ampiezze dei relativi processi, teniamo inoltre conto di un fattore corrispondente al riordinamento strutturale dei partoni inclusi nei diagrammi di dualità. Si è trovato che le sezioni d’urto differenziali, così come la dipendenza dall’energia, sono in eccellente accordo con i dati sperimentali. Inoltre, questo modello può spiegare bene il fatto che tutti questi processi nelle regioni in avanti sono caratterizzati da abbassamenti delle sezioni d’urto differenziali, ma nella regione all’indietro, anche se i processi π+p→pπ+, π−p→nπ0 sono caratterizzati da abbassamenti, nessuno di questi abbassamenti si ha nel processo π−p→pπ−.РеэюмеНа основе динамической дуальной партонной модели сильных вэаимодействий, рассмотренной в предыдушей статье, мы эдесь исследуем процессы π±p→π±p и π−p→nπ0 при высоких знергиях в направлениях вперед и наэад. Чтобы включить концепцию дуальности, принимается, что два любых точечных общекта со спином 1/2 (партоны) могут обраэовать тс-меэонный кластер в структуре нуклона, и что основное вэаимодействие, участвуюшее в МВ рассеянии, представляет вэаимодействие падаюшего меэона с ?-меэоном в структуре нуклона. Чтобы вычислить амплитуды для соответствуюших процессов, мы также учитываем фактор, соответ-ствуюший структурной перегруппировке партонов, участвуюших в дуальных диаг-раммах. Дифференциальные поперечные сечения, а также знергетическая эависи-мость прекрасно согласуются с зкспериментальными данными. Кроме того, зта медель может хорощо общяснить тот факт, что зти процессы в направлении вперед характериэуются минимумами в дифференциальных поперечных сечениях, но в направлении наэад такой минимум отсутствует в продессе π−p→pπ−, хотя для процессов π+p→pπ+, и π−p→nπ0 характерны минимумы.
118933483
Possible resolution of the like-sign dimuon and trimuon riddle in the neutrino-induced interactions at high energies
Popular theoretical models almost failed so far to explain any of the production characteristics of the like-sign dimuon and mixed-sign trimuon production in high-energy neutrino interactions. On the basis of some new ideas about the structure of nucleons, we have attemped here to analyse the experimental results and have achieved a fair amount of success. Some verifiable predictions have also been forwarded.
122502106
NONCOMMUTATIVE GEOMETRY, QUANTIZATION AND TOPOLOGICAL ASPECTS OF A FERMION
It is pointed out here that noncommutative geometry having the space–time manifold X=M4×Z2 leads to the quantization of a fermion when the discrete space–time is incorporated as an internal variable. The chiral description of fermions in this geometry necessitates the introduction of a disconnected gauge group for the external Abelian field interacting with the matter field in a chiral symmetric way. The symmetry breaking then gives rise to chiral anomaly which is responsible for the topological origin of mass and is linked up with the nonvanishing value of the Berry phase.
116643759
Dilepton production phenomena in high energy hadronic collisions
Experiments over the last few years have given rise to a blizzard of new and interesting results with regard to the production of various dileptons in high energy hadronic collisions. An attempt has here been made on the basis of some new ideas about the structure of hadrons and thus on a newly proposed version of the multiple production model to explain some of the crucial features in connection with the various multiplicity--ratios, cross--section ratios and the average values of the transverse momenta of the produced dileptons. In the backdrop of the hadron--hadron and lepton--hadron collisions, the model for dilopton production proposed here has some degree of generality which is one of its main features.