In the context of pure QED, we obtain analytic expressions for the contributions to the Bhabha scattering differential cross section at order α4 which originate from the interference of two-loop photonic vertices with tree-level diagrams and from the interference of one-loop photonic diagrams amongst themselves. The ultraviolet renormalization is carried out. The IR-divergent soft-photon emissi...

I am happy to announce today that the Department’s proposal to set up a Dr Homi Bhabha National Institute has been approved. This will bring together ten premier institutions all over the country under a single research-driven framework. This will help ensure that our scientists and our scientific establishments remain at the forefront of the pursuit of excellence, comparable with the best glob...

We define a complete set of scalar master integrals (MIs) for massive 2-loop QED Bhabha scattering. Among others, there are thirty three 2-loop box type MIs. Five of them have been published in (semi-)analytical form, one is determined here, the rest remains to be calculated. Further, the last four so far unknown 2-loop 3-point MIs are identified and also computed here.

The four-fermion contact-interaction searches in the process ee → μμ at a future ee Linear Collider with c.m. energy √ s = 0.5 TeV and with both beams longitudinally polarized are studied. We evaluate the corresponding model-independent constraints on the coupling constants, emphasizing the role of beam polarization, and make a comparison with the case of Bhabha scattering. Talk given at the In...

1 Laboratoire Léon Brillouin, CEA-CNRS, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France 2 Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India 3 Institut des Matériaux Jean Rouxel (IMN), Université de Nantes CNRS, 2 Rue de la Houssinère BP 32229, 44322 Nantes Cedex 3, France 4 Laboratoire des Interfaces Complexes et de l'Organisation Nanométrique, ECE-Paris Ecole d'...

R. Mukhopadhyay,1,* S. Mitra,1 M. Johnson,2 V. R. Rajeev Kumar,3 and T. Pradeep3,† 1Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India 2Institute Lau-Langevin, BP156, F-38042, Grenoble, Cedex 9, France 3DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instrument Facility, Indian Institute of Technology Madras, Chennai 600 036, India R...

Department of Vegetable Science and Floriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya Palampur, 176 062 (Himachal Pradesh), India 2 Nuclear Agriculture & Bio-technology Division (NA & BTD), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai – 400 085 (Maharashtra), India Department of Entomology, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya Palamp...

1 Botanical Institute and Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany, Department of Botany, Raja Peary Mohan College, University of Calcutta, Uttarpara, India, Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA, Centre for Organismal Studies, University of Heidelberg, Heidelberg, Germany, Department o...

Möller Scattering and Bhabha Scattering on noncommutative spacetime is restudied. It is shown that the noncommutative correction of scattering cross sections is not monotonous enhancement with the total energy of colliding electrons, there is an optimum collision energy to get the greatest noncommutative correction. Most surprisingly, there is a linear relation between the noncommutative QED th...