4,090 research outputs found
Masses and Strong Decay properties of Radially Excited Bottom states B(2S)and B(2P) with their Strange Partners Bs(2S) and Bs(2P)
In this paper, we analyzed the experimentally available radially excited
charm mesons to predict the similar spectra for the n=2 bottom mesons. In the
heavy quark effective theory, we explore the flavor independent parameters to
calculate the masses for the experimentally unknown n=2 bottom mesons B(2S),
B(2P), Bs(2S) and Bs(2P). We have also analyzed these bottom masses by applying
the QCD and 1/mQ corrections to the lagrangian leading to the modification of
flavor symmetry parameters as. Further strong decay widths are determined using
these calculated masses to check the sensitivity of these corrections for these
radially excited mesons. The calculated decay widths are in the form of strong
coupling constant geHH, egSH and egTH. We concluded that these corrections are
less sensitive for n=2 masses as compared to n=1 masses. Branching ratios and
branching fractions of these states are calculated to have a deeper
understanding of these states. These predicted values can be confronted with
the future experimental data.Comment: 11 Pages, 6 Table
Global transcriptome analysis of heat stress response of grape variety 'Fantasy Seedless' under different irrigation regimens
Grapevine (Vitis vinifera L.), a commercially important fruit crop worldwide, faces several challenging conditions during its growth cycle. Among many abiotic stresses, heat and moisture stresses have major impact on grapevine productivity and fruit quality. Transcriptome analysis of heat stress response of grape variety 'Fantasy Seedless' grown under different irrigation regimens identified large number of differentially expressed genes. Genes belonging to chaperone mediated protein folding and cell-wall modification pathways were found to play a significant role in plant response to heat as well as moisture stress. Subsurface irrigation helped minimize the adverse effects of stress through modulation of genes involved in cell homeostasis. The study has given critical insight into grapevine response to heat stress arising due to aberrant weather conditions
Finite BRST Mapping in Higher Derivative Models
We continue the study of finite field dependent BRST (FFBRST) symmetry in the
quantum theory of gauge fields. An expression for the Jacobian of path integral
measure is presented, depending on a finite field-dependent parameter, and the
FFBRST symmetry is then applied to a number of well-established quantum gauge
theories in a form which includes higher-derivative terms. Specifically, we
examine the corresponding versions of the Maxwell theory, non-Abelian vector
field theory, and gravitation theory. We present a systematic mapping between
different forms of gauge-fixing, including those with higher-derivative terms,
for which these theories have better renormalization properties. In doing so,
we also provide the independence of the S-matrix from a particular gauge-fixing
with higher derivatives. Following this method, a higher-derivative quantum
action can be constructed for any gauge theory in the FFBRST framework.Comment: 9 pages, published in Braz. J. Phy
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