Symmetries play important roles in the understanding of hadron structures and spectroscopy. Motivated by discovery doubly charmed tetraquark $T_{cc}^+(3875)$, we study ground states heavy tetraquarks with QCD inspired antiquark-diquark symmetry constituent quark model. Six $T_{QQ} (Q=c,b)$ are predicted lightest $T_{cc}$ state has a mass $3875.8\pm 7.6$ MeV spin-parity $1^+$ which consistent th...

The Cabibbo-Kobayashi-Maskawa matrix elements $|{V}_{cb}|$ and $|{V}_{ub}|$ can be obtained by combining data from the experiments with lattice QCD results for semileptonic form factors $\overline{B}\ensuremath{\rightarrow}{D}^{*}\ensuremath{\ell}\overline{\ensuremath{\nu}}$ $\overline{B}\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\ell}\overline{\ensuremath{\nu}}$ decays. It is highly d...

background : heavy metals and pah s in flue gas have received considerable attention in recent years due to their mutagenic or carcinogenic properties. pah s are products of incomplete combustion of carbonaceous compounds at high temperatures. heavy metals are released into the ambient air from the same sources as those earlier mentioned for pah s . the present study was carried out to investig...

A greenhouse experiment has been planned for this study to delineate the benefits of two types of rice husk biochars (namely B300 and B600 which are prepared at 300°C and 600°C, respectvely) and coal fly ash (CFA), as soil amendments, for decreasing the amount of some heavy metals (like Pb, Cd, Ni, Cr, and Cu) as well as mobility and phytoavailability in an artificially-calcareous multi-element...

A greenhouse experiment has been planned for this study to delineate the benefits of two types of rice husk biochars (namely B300 and B600 which are prepared at 300°C and 600°C, respectvely) and coal fly ash (CFA), as soil amendments, for decreasing the amount of some heavy metals (like Pb, Cd, Ni, Cr, and Cu) as well as mobility and phytoavailability in an artificially-calcareous multi-element...

background foods are enriched with variety of chemical elements. some of these elements are necessary for human health. these elements enter in liquid, the cells and other organs, certain amount of these elements are essential for body organs to work properly. objectives this research was conducted to compare the level of lead and cadmium contamination in garlic species planted in ramhormoz and...

abstract: numerical weather forecasting models are used for forecasting and dynamic conditions analysis of atmosphere phenomena in recent years. this research investigates dynamic and thermodynamic conditions in heavier precipitation events in different synoptic patterns in the southern coasts of caspian sea using wrf model. database precipitation events were formed. super heavy and heavy preci...

lead, cadmium, mercury and arsenic are the most important heavy metals which may cause health risks following consumption of contaminated foods. table salt is one the mostly used food additive with unique place in food consumption. although purified table salt is expected to have lower level of contamination, some iranians still prefer to use rock salt. use of rock salt for food purposes has be...