Isgur-Wise function in a QCD potential model with coulombic potential as perturbation

We study heavy light mesons in a QCD inspired quark model with the Cornell potential$-\frac{4\alpha_{S}}{3r}+br+c$. Here we consider the linear term $br$ as the parent and $-\frac{4\alpha_{S}}{3r}+c$ i.e.the Coloumbic part as the perturbation.The linear parent leads to Airy function as the unperturbed wavefunction. We then use the Dalgarno method of perturbation theory to obtain the total wavefunction corrected upto first order with Coulombic peice as the perturbation.With these wavefunctions, we study the Isgur-Wise function and calculate its slope and curvature.Comment: paper has been modified in Airy functions calculation upto o(r^3

Motives of Deligne-Mumford Stacks

For every smooth and separated Deligne-Mumford stack $F$, we associate a motive $M(F)$ in Voevodsky's category of mixed motives with rational coefficients \mathbf{DM}^{\eff}(k,\mathbb{Q}). When $F$ is proper over a field of characteristic 0, we compare $M(F)$ with the Chow motive associated to $F$ by Toen (\cite{t}). Without the properness condition we show that $M(F)$ is a direct summand of the motive of a smooth quasi-projective variety.Comment: to appear in Advances in Mathematic

Can Effective Field Theory of inflation generate large tensor-to-scalar ratio within Randall Sundrum single braneworld?

In this paper my prime objective is to explain the generation of large tensor-to-scalar ratio from the single field sub-Planckian inflationary paradigm within Randall Sundrum (RS) single braneworld scenario in a model independent fashion. By explicit computation I have shown that the effective field theory prescription of brane inflation within RS single brane setup is consistent with sub- Planckian excursion of the inflaton field, which will further generate large value of tensor-to-scalar ratio, provided the energy density for inflaton degrees of freedom is high enough compared to the brane tension in high energy regime. Finally, I have mentioned the stringent theoretical constraint on positive brane tension, cut-off of the quantum gravity scale and bulk cosmological constant to get sub-Planckian field excursion along with large tensor-to-scalar ratio as recently observed by BICEP2 or at least generates the tensor-to-scalar ratio consistent with the upper bound of Planck (2013 and 2015) data and Planck+BICEP2+Keck Array joint constraint.Comment: 20 pages, Revision accepted by Nuclear Physics

Thank God it's Friday: Student Attendance in Classes Just before Weekend

It is generally assumed that attendance level in Friday classes at an undergraduate level is low compared to other days of the week. The purpose of this study is to validate this assumption. A Chi-square analysis was performed on the attendance of all students enrolled in a Mechanical, Electrical, and Plumbing course in Spring 2017, offered at a state university in Texas. The results indicated that the number of absences in Friday classes was significantly higher than in other classes of the week; the Chi-square value was found to be 83.376 at the level of significance (p-value) of less than 0.0001. Some probable reasons for this student behavior has been reported in the study. A few remedial measures have also been suggested.Cockrell School of Engineerin

Leptoquark Search at e+e−e^+ e^- Colliders

We investigate the possibility of detecting a scalar leptoquark, coupling to the electron and the top, at a linear collider. For coupling strength equalling the weak coupling constant, the present mass bounds are of the order of 300 GeV. We demonstrate that at the NLC, one could detect such particles if their mass were less than a few TeV's.Comment: 12 pages (LaTeX), 4 figures (uuencoded postscript file submitted through `figures option'), MPI preprint MPI-PhT/94-5

Direction & Dilemma of Tropical Oral Health: a position paper

A number of tropical and communicable diseases are evident as oral manifestations. The tropical and communicable disease of oral health concern is an issue because, not only it is restricted to tropical countries, it is also affecting an underserved population of developed countries. Cross-border transmission of communicable diseases of tropical countries is an agenda where the number of tropical diseases, manifested with oral lesions, has not been taken into consideration by oral health care providers for timely identification and setting a goal for prevention and control of transmission at home and abroad. Moreover, every developed country has underserved populations that are prone to develop communicable oral diseases/TODs like tropical countries. The underserved population in developed countries are also experiencing higher incidence rate of communicable diseases which are not necessarily due to cross-border transmission, but related to their poor life-style and other prevailing factors of inequalities. However, the type of communicable diseases is dependent on the mode of transmission and progression; it may be contagious, vector borne or environmentally transmitted. Using TRIP (copy available at ICTOH*), I have searched and collated information anecdotally to understand the situation of the tropical oral diseases. First, we need to define what are tropical oral diseases? On this issue we had several discussions and interactions and reviewing of reports. We concluded that the tropical oral diseases largely cover communicable diseases which are mostly prevalent in the tropical countries. Also non-communicable diseases of life-threatening nature, those that are widely prevalent in the tropical countries, such as oral cancer and pre-cancer (in SE Asia), Noma (in Africa) could be taken into consideration to be identified as a category of tropical oral diseases (TODs). Moreover, till date, we are not able to rule out precisely, any possibility of mutational transmission of communicable disease(s) of oral health concern. Therefore, although all the communicable diseases have an infective nature, we cannot ignore the potential of inheritance factor which may exist irrespective of tropical and non-tropical locations, globally. To reduce the inequalities and improve prevention, including consistent clinical management (tertiary care), our oral health care providers may need to be adequately equipped to combat TODs. There are various oral diseases and conditions which fall into the category of ‘TODs,’ that need to be detected and managed by the general dental practitioners. They need to be able to ascertain when they should refer the critical TODs/cases to a specialist in oral medicine and/or surgery or a physician. Many of these disease (TODs) conditions are manifested with similar features and therefore it becomes almost impossible to identify these diseases clinically for definite diagnosis. In order to ensure that dental practitioners are able to tackle TODs appropriately and efficiently, development of appropriate measures to tackle TODs, in both clinical and community settings is necessary. The development of clinical databases and diagnostic test reports, carried out in the tropical countries is therefore highly recommended. The pooling of resources and clinical knowledge for early detection (required for early prevention and appropriate management of TODs) should therefore be an important point of consideration. I also strongly suggest developing a framework convention to recognize the TODs globally through a realistic strategic approach. Another very important component is development of research specifically in the areas of TODs. In the 1st International working group meeting we had discussed and taken resolution which had been published as a declaration from Poole, England. We have already started to develop a database in part of India, Bangladesh, Sudan, and Jordan. Therefore, it is our responsibility and commitment to put our efforts to pursuing need-based researches on the priority areas of TODs. The identification of the TOD priority research and the establishment of a research team with a lead will be a significant shot in the arm in the process of developing TOH and may generate the momentum which will ultimately lead to the further development of this area. Therefore, in this meeting I suggest the development of a research team(s) by a lead, and to work for securing grants-in –aids, nationally and internationally. We have started few projects with local support which will probably help act as pilot projects for the larger collaborative projects(s) to submitting for grants-in-aids in the near future. We would need to work on TODs, focusing on the aim of developing a few specific objectives, keeping in mind how beneficial it will be for the WHO International Clinical Trial Registry Platform. We may eventually propose a broad classification of TDOs as (i) Communicable and transmissible tropical oral diseases (TODs) includes Category 1 (Highly prevalent): AIDS/HIV infection, Malaria, TB, Kala-Azar, and Category 2 (Moderately prevalent): Mucocutaneous Leishmaniasis (MCL), Onchocerciasis, and Leprosy. (ii) Non-communicable diseases causing death and disability in the tropical countries. Oral Cancer, Noma (Cancrum Oris), PCM i.e. Marasmus (M), Kwashiorkor (K) including M&K and Diabetes. We do not have sufficient information on oral manifestation of WHO listed other tropical and communicable diseases which are mostly prevalent in African and Asian tropical countries, needs to be data-based. Moreover, we also need to identify the other systemic diseases of oral health concern in the tropical countries, (Proposed checklist draft protocol is available at ICTOH*).Some of those diseases is preceded with oral signs and/or coincided should be an important concern for oral health practitioners. However, I have identified the following constrains could be tackled through effective approaches for a realistic development of TODs, and that may help in a direction. Inadequate clinical data: Needs to be developed with an authentic database Inadequate training facilities for clinical diagnosis and management of TODs and conditions: A structured training programme for clinical diagnosis and management needs to be developed Lack of initiative for community education for the prevention and control: Oral health professionals of the tropical countries may need to participate, individually, and/or in a team (through an integrated approach) for the prevention and control of communicable diseases of oral health concern including TODs and general systemic diseases with oral manifestations (Preceded and/or coincided oral signs) Non-existence of categorization of Tropical Disease Research (TDR) [cf. WHO TDR value for tropical disease]: A specific TDR for TODs would be a good initiative Inadequate research: Priority-based systematic lab-based and epidemiological researches need to be developed, within the existing facilities Non existence of specific course contents: The syllabus and curriculums of the undergraduate and postgraduate courses need to be incorporated with the specific modules of TODs (especially in the tropical countries)

Discrete Symmetry, Neutrino Magnetic Moment and the 17 Kev Neutrino

The problem of generating large transition magnetic moments for nearly massless neutrinos in a truly three--generation case is discussed. A model to achieve the same by exploiting an octahedral symmetry is presented. The scheme also accomodates a radiatively generated mass of $17\:keV$ for a pseudo--Dirac neutrino that decays rapidly through the Majoron channel.Comment: LaTeX file, 17 pages & two figures (postscript file appended