P. Gupta

Study of direct photon plus jet production in CMS experiment at \sqrt{s} = 14 TeV

We present simulation results of γ+jet analysis using CMS (compact muon solenoid) object-oriented software at the large hadron collider (LHC) center of mass energy

Insight into the mechanisms of enhanced production of valuable terpenoids by arbuscular mycorrhiza

sqrt{s}

Spatial distribution of arsenic in different leaf tissues and its effect on structure and development of stomata and trichomes in mung bean, Vigna radiata (L.) Wilczek

= 14xa0TeV. The study of direct photon production helps in validating the perturbative quantum chromodynamics (pQCD) and providing information on the gluon distribution in the nucleons. Direct photon processes also constitute a major background to several other standard model (SM) processes and signals of new physics. Thus these processes need to be understood precisely in the new energy regime. In this work, we have done a detailed study of the GEANT4 simulated γ+jet events generated with Pythia, and the related background processes. Isolation cuts have been optimized for direct photon which improves the signal over background ratio by ∼25% as compared to previous studies done in CMS. The inclusion of a large Δφ cut between the photon and the leading jet at 40° in the analysis leads to a further increase of ∼15% in S/B, thus giving an overall gain of ∼42% in S/B ratio.

Study of direct photon plus jet production in CMS experiment at <img src="/fulltext-image.asp?forma

AbstractnTerpenoids, in addition to being essential for plant growth and survival, are commercially valued for their medicinal properties, ecological significance, and used as flavors and fragrances. Prospective role of arbuscular mycorrhiza (AM) symbiosis in improving the accumulation of secondary metabolites especially terpenoids has gained recognition over the past two decades. Increased production of terpenoids in aboveground parts of AM-colonized medicinal plants has extensively been described. Understanding the mechanisms underpinning increase in accumulation of specific terpenoids in AM plants is important for obtaining higher yield and to improve the potential of AM in sustainable cultivation of plants harboring these compounds. Enhanced phosphorus uptake in the mycorrhizal plants has been largely credited for the increase in terpenoid production. However, recent findings have suggested AM mediated manipulation of morphology, biochemistry and gene transcription in plants. The review provides an update on recent findings in the field of AM research with a special focus on production of pharmaceutically important terpenoids. Several points are highlighted for future research to elucidate probable mechanisms underlying increase in terpenoids in mycorrhizal plants.