7,368 research outputs found
Human casualties and agricultural crop raiding by wild pigs and mitigation strategies in India
Chauhan, N.P.S
Agricultural crop depredation by nilgai antelope (Boselaphus tragocamelus) and mitigation strategies: challenges in India
Chauhan, N.P.S
Perturbativity constraints on and left-right models and implications for heavy gauge boson searches
We derive perturbativity constraints on beyond standard model scenarios with
extra gauge groups, such as or , whose generators contribute to
the electric charge, and show that there are both upper and lower limits on the
additional gauge couplings, from the requirement that the couplings remain
perturbative up to the grand unification theory (GUT) scale. This leads to
stringent constraints on the masses of the corresponding gauge bosons and their
collider phenomenology. We specifically focus on the models based on
and the left-right symmetric
models based on , and discuss the
implications of the perturbativity constraints for new gauge boson searches at
current and future colliders. In particular, we find that the stringent flavor
constraints in the scalar sector of left-right model set a lower bound on the
right-handed scale TeV, if all the gauge and quartic couplings
are to remain perturbative up to the GUT scale. This precludes the prospects of
finding the boson in the left-right model at the LHC, even in the
high-luminosity phase, and leaves only a narrow window for the boson. A
much broader allowed parameter space, with the right-handed scale up to
TeV, could be probed at the future 100 TeV collider.Comment: 30 pages, 9 figures, 4 tables, minor changes, version to be published
in JHE
Human-leopard conflict in Mandi district, Himachal Pradesh, India
Kumar, D., Chauhan, N.P.S
Predictions from non trivial Quark-Lepton complementarity
The complementarity between the quark and lepton mixing matrices is shown to
provide robust predictions. We obtain these predictions by first showing that
the matrix V_M, product of the quark (CKM) and lepton (PMNS) mixing matrices,
may have a zero (1,3) entry which is favored by experimental data.
We obtain that any theoretical model with a vanishing (1,3) entry of V_M that
is in agreement with quark data, solar, and atmospheric mixing angle leads to
. This value is consistent with the
present 90% CL experimental upper limit. We also investigate the prediction on
the lepton phases. We show that the actual evidence, under the only assumption
that the correlation matrix V_M product of CKM and PMNS has a zero in the entry
(1,3), gives us a prediction for the three CP-violating invariants J, S_1, and
S_2. A better determination of the lepton mixing angles will give stronger
prediction for the CP-violating invariants in the lepton sector. These will be
tested in the next generation experiments. Finally we compute the effect of non
diagonal neutrino mass in "l_i -> l_j gamma" in SUSY theories with non trivial
Quark-Lepton complementarity and a flavor symmetry. The Quark-Lepton
complementarity and the flavor symmetry strongly constrain the theory and we
obtain a clear prediction for the contribution to "mu -> e gamma" and the "tau"
decays "tau -> e gamma" and "tau -> mu gamma". If the Dirac neutrino Yukawa
couplings are degenerate but the low energy neutrino masses are not degenerate,
then the lepton decays are related among them by the V_M entries. On the other
hand, if the Dirac neutrino Yukawa couplings are hierarchical or the low energy
neutrino masses are degenerate, then the prediction for the lepton decays comes
from the CKM hierarchy.Comment: 15 pages, 5 figures, ws-ijmpa class included, Proceedings of the CTP
Symposium on Sypersymmetry at LH
SOME RESULTS ON THE DESIGN OF EXPERIMENTS FOR COMPARING UNREPLICATED TREATMENTS
In early generation variety trials, large numbers of new varieties may be compared, and little seed is usually available for each variety. A so-called unreplicated trial has each new variety on just one plot at a site, but includes several (often around 5) replicated check or control (or standard) varieties. The total proportion of check plots is usually between 10% and 20%. The aim of the trial is to choose some (around 1/3) good performing varieties to go on for further testing, rather than precise estimation of their mean yield.
Now that spatial analyses of data from field experiments are becoming more common, there is interest in an efficient layout of an experiment given a proposed spatial analysis. Some possible design criteria are discussed, and efficient layouts under spatial dependence are considered
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