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91.
Rohini M. Godbole 《Pramana》2007,69(6):1215-1219
This talk will consist of a set of personal remarks giving my impressions of the International Workshop on Linear Colliders
(LCWS06) and a theorist’s perspective.
相似文献
92.
Dilip Kumar Ghosh Rohini M. Godbole Sreerup Raychaudhuri 《Zeitschrift fur Physik C Particles and Fields》1997,75(2):357-365
We investigate the possibility that the excess of four-jet events in e + e ? collisions at LEP-1.5 which has been reported by the ALEPH Collaboration could be due to the production of charginos or neutralinos, followed by their decay into quark jets through baryon number-violating (λ″) couplings. An estimate at the parton level shows, however, that these events cannot be due to neutralinos because of the low cross-section, and is unlikely to be due to the production of chargino pairs because of the largely different event shapes. 相似文献
93.
R. M. Godbole 《Pramana》1998,51(1-2):217-228
After giving a very brief introduction to the resolved photon processes, I will summarize the latest experimental information
from HERA, on resolved photon contribution to largep
T jet production as well as to direct photon production. I will point out the interesting role that resolved photon processes
can play in increasing our understanding of the dynamics of the quarkonium production. I will then discuss the newer information
on the parton content of virtual photons as well as thek
T distribution of the partons in the photon. I will end by giving predictions of an eikonalized minijet model for σ
γγ
inel
which crucially uses the experimental measurement of the abovementionedk
T distribution and comparing them with data.
On leave of absence from Department of Physics, University of Bombay, Mumbai 400 076, India 相似文献
94.
We review high-energy scattering processes that are sensitive to the hadronic structure of the photon, describing theoretical
predictions as well as recent experimental results. These processes include deep-inelastic electron-photon scattering ate
+
e
− colliders; and the production of jets, heavy quarks and isolated photons in the collision of real photons ate
+
e
− colliders, as well as in photon-photon collisions atep colliders. We also comment on minijet based calculations of totalγp andγγ cross-sections, and discuss the possibility that future lineare
+
e
− colliders might produce very large photon fluxes due to the beamstrahlung phenomenon; in the most extreme cases, we predict
more than one hadronicγγ event to occur at every bunch crossing. 相似文献
95.
96.
A. P. Godbole M. V. Koutras F. S. Milienos 《Annals of the Institute of Statistical Mathematics》2011,63(3):559-584
A k × n array with entries from a q-letter alphabet is called a t-covering array if each t × n submatrix contains amongst its columns each one of the q
t
different words of length t that can be produced by the q letters. In the present article we use a probabilistic approach based on an appropriate Markov chain embedding technique,
to study a t-covering problem where, instead of looking at all possible t × n submatrices, we consider only submatrices of dimension t × n with its rows being consecutive rows of the original k × n array. Moreover, an exact formula is established for the probability distribution function of the random variable, which
enumerates the number of deficient submatrices (i.e., submatrices with at least one missing word, amongst their columns),
in the case of a k × n binary matrix (q = 2) obtained by realizing kn Bernoulli variables. 相似文献
97.
M. Mohapatra R.M. KadamR.K. Mishra C.P. KaushikB.S. Tomar S.V. Godbole 《Physica B: Condensed Matter》2011,406(20):3980-3984
Gamma radiation induced changes were investigated in sodium-barium borosilicate glasses containing Eu. The glass composition was similar to that of nuclear waste glasses used for vitrifying Trombay research reactor nuclear waste at Bhabha Atomic Research Centre, India. Photoluminescence (PL) and electron paramagnetic resonance (EPR) techniques were used to study the speciation of the rare earth (RE) ion in the matrix before and after gamma irradiation. Judd-Ofelt (J-O) analyses of the emission spectra were done before and after irradiation. The spin counting technique was employed to quantify the number of defect centres formed in the glass at the highest gamma dose studied. PL data suggested the stabilisation of the trivalent RE ion in the borosilicate glass matrix both before and after irradiation. It was also observed that, the RE ion distributes itself in two different environments in the irradiated glass. From the EPR data it was observed that, boron oxygen hole centre based radicals are the predominant defect centres produced in the glass after irradiation along with small amount of E’ centres. From the spin counting studies the concentration of defect centres in the glass was calculated to be 350 ppm at 900 kGy. This indicated the fact that bulk of the glass remained unaffected after gamma irradiation up to 900 kGy. 相似文献
98.
The aim of this paper is to show that a common fixed point theorem can be proved for nonlinear contractive condition in intuitionistic fuzzy metric spaces without assuming continuity of any mappings. To prove the result we use new commutativity condition for mappings weaker than compatibility of mappings. 相似文献
99.
Rohini M Godbole 《Pramana》2006,67(5):835-847
In this talk I discuss some aspects of CP violation (CPV) in supersymmetry (SUSY) as well as in the Higgs sector. Further,
I discuss ways in which these may be probed at hadronic colliders. In particular I will point out the ways in which studies
in the
sector at the Tevatron may be used to provide information on this and how the search can be extended to the LHC. I will then
follow this by a discussion of the CP mixing induced in the Higgs sector due to the above-mentioned CPV in the soft SUSY breaking
parameters and its effects on the Higgs phenomenology at the LHC. I would then point out some interesting aspects of the phenomenology
of a moderately light charged Higgs boson, consistent with the LEP constraints, in this scenario. Decay of such a charged
Higgs boson would also allow a probe of a light (≲50 GeV), CP-violating (CPV) Higgs boson. Such a light neutral Higgs boson
might have escaped detection at LEP and could also be missed at the LHC in the usual search channels. 相似文献
100.
Abhay D. Deshmukh S. J. Dhoble S. V. Godbole M. K. Bhide D. R. Peshwe 《Indian Journal of Physics》2009,83(4):423-428
The calcium aluminates doped with Eu ions, Ca5Al8O14: Eu, phosphors are prepared by the combustion method. The formation of crystalline aluminates was confirmed by X-ray diffraction
pattern. The prepared phosphors were characterized by SEM, TGA, DTA, particle size analyzer and Photoluminescence (PL) techniques.
From the UV-excited luminescence spectra it was found that the Eu ions acts as a luminescent centre with luminescence at the
blue (λ
max = 470 nm) region due to 4f
65d
1 → 4f
7 transition. The excitation spectra show the broad band at 355 nm wavelength (λ
em = 470 nm). The excitation 355 nm is a mercury free excitation and therefore Ca5Al8O14: Eu may be useful for the solid state lighting phosphor in lamp industry.
相似文献