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Q Q Systems in Qcd-Based Models and Scalar Mesons

Thesis Info

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Author

Jamil, Muhammad Imran

Program

PhD

Institute

University of the Punjab

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2011

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2495/1/2986S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727050849

Similar


The dynamical effects of gluon field overlap factor ’f’ between different q q̄ clusterings of a qq q̄ q̄ system has been seen in the scattering process of two mesons. The form of ’f’ (exp(−kS min )) used in the first part of the work was selected from a comparison of different forms of ’f’ with two-colour numerical lattice simulations in the pure gluonic theory. The four quark potential matrix model being used is known to fit well a large number of data points for lattice simulations of different geometries of a four-quark system. In the first part of the work we study the coupling of a tetraquark system to an exchanged meson- meson channel. We have used the formalism of resonating group method, treated kinetic energy and overlap matrices on model of the potential matrix. We have taken advantage of few approximations e.g. we have used quadratic confinement instead of linear plus coulombic for pair wise interactions. Furthermore in the first part of the study we have also used the Born approximation and taken the constituent quark masses to be equal. There we find that when we used the minimal area based form of ’f’ in the off diagonal elements of potential energy, kinetic energy and overlap matrices in the gluonic basis in the model of four-quark system, we get a (scattering) angle dependence of T-matrix elements and phase shifts. Its partial wave analysis reveals that along with S-wave there is a presence of D-wave and higher angular momentum components in the T-matrix elements. In addition to the obvious implications of this result for the meson-meson scattering, this new feature indicates the possibility of orbital excitations influencing properties of meson- meson molecules through a polarization potential. In the 2nd part of the work another form of ’f’ (exp(−b s k f i<j 2 )) is used that is chosen only for computational convenience, r ij though the value used for the parameter in the exponent has its origin in numerical lattice simulations. There we have calculated the cross sections and phase shifts for the scattering xixii process of D o D o∗ −→ ωJ/ψ when f (Gaussian form) is used in the off-diagonal elements of potential energy, kinetic energy and normalization matrices of model of q 2 q 2 systems in the gluonic cluster basis. These cross sections can be potentially compared with actual experiments. Furthermore we have checked X(3872) to be recognized as a possible bound state of D o D o∗ system. Thus we have extended in the dynamical study of the f-model the spin-flavor independent formalism to the realistic systems, which are scalar mesons. By including the spin and flavor, we have addressed actual meson-meson systems. o These include D o D which is a scalar meson. But, considering current topics in meson spectroscopy, we have calculated dynamical predictions for a D o D important component of the much-addressed X(3872) meson.
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64. Al-Taghabun/Mutual Neglect

64. Al-Taghabun/Mutual Neglect

I/We begin by the Blessed Name of Allah

The Immensely Merciful to all, The Infinitely Compassionate to everyone.

64:01
a. Whatever is within the celestial realm the terrestrial world is Glorifying Allah – The One and Only God.
b. For HIM is The Sovereignty, and for HIM is The Praise and Gratitude.
c. And HE Manifests Sovereignty over all existence.

64:02
a. It is HE WHO created you as human species starting from Adam and Eve,
b. then, among you, some would be a disbeliever and among you some would be a believer.
c. And Allah Watches over whatever you do: good and evil.

64:03
a. HE created the celestial realm the terrestrial world with truth: meaningfully and for a
definite purpose,
b. and gave you shape and shaped you well,
c. and made the human form to be the best of forms.
d. And to HIM is going to be your return: starting with death and then upon the resurrection.

64:04
a. HE Knows whatever is within the celestial realm and the terrestrial world,
b. and HE knows whatever you hide of your motives and deeds as well as whatever you disclose of them.
c. And Allah is All-Aware of whatever is within the hearts.

64:05
a. Has not the account of those come to you who disbelieved before you in the Missions and the Messages of their Messengers?
b. So they tasted the evil consequences of what they did, and for them was a painful punishment.

64:06
a. That was so because their Messengers came to them with Clear Messages, but they would
mockingly say:
b. What!
c....

Antimicrobial Susceptibility Behavior of Bacterial Isolates from Different Clinical Samples at Nishtar Hospital Multan

The pathogenic bacteria are getting resistant to antibiotics is significantly growing in the developing countries of the world including Pakistan. The present study was designed to find the basic study on resistance among the patients coming to the Nishtar Hospital, Multan. The study was carried out in the Department of Pathology, Nishtar Hospital, Multan. Total 387 clinical samples of urine, pus, high vaginal swab (HVS) and wound were surveyed for the existence of Gram-positive and Gram-negative pathogens. For these bacterial isolates, antimicrobial susceptibility tests were performed. E. Coli was the most prevalent isolates followed by Staphylococcus aureusand Pseudomonas. E. Coli was predominated in urine, pus, HVS and wound specimens. Occurance of Staphylococcus aureus, MRSA, Candida and Pseudomonas were 7.9 %, 3.9 %, 14.7 % and 1.4 % respectively among the clinical specimens. E. Coli shows highest resistance to Linezolid (98.3%) followed by Ceftrizone (90.8%), Sulfamethoxazole + Trimethoprim (85%), Moxifloxacin (82.5%). High frequency of resistance specifies that there is an unremitting requirement of surveillance of resistance behaviour of antimicrobial agents in our study is to investigate the trend of this problem.

Implications of the Adoption of Water Saving Irrigation Interventions for Enhancing Wheat Yield at Small Farms of District Faisalabad Pakistan

Pakistan is an agricultural country. Agriculture is the mainstay of the country’s economy. Wheat as a staple food crop of Pakistan is grown on about 8 million hectares every year. It is a Rabi (winter) crop and follows by rice and cotton in rice-wheat and cotton-wheat systems, respectively. Pakistan’s population is increasing at an alarming pace and it has reached to about 170 million already. It is, therefore, imperative to enhance wheat yield by encouraging farmers, predominantly small farmers, to grow more wheat with efficient and judicious use of land and water resources. Land and water resources especially for agricultural purposes are getting scarce day by day due to mismanagement. This water deficient scenario is also posing serious threats to food security for coming generations. A shift in the irrigation techniques intervening flooded irrigation methods for efficient utilization of resources are being recommended and same has been actively adopted in many areas of the Pakistan. The irrigation water saving technologies mainly include Watercourse Improvement, Improved farm layout, Laser land leveling and bed planting of wheat. The techniques adopted in the Punjab have shown encouraging results. To see the adoption of latest technologies at small farms, district Faisalabad was selected as study area, which consists of five Tehsils; Faisalabad, Jaranwala, Sammandri, Chak Jhumra and Tandlianwala. To see implications of the water saving irrigation interventions a tehsile wise list of improved watercourses was collected from the office of the District Officer, Water Management Faisalabad. A list of 25 watercourses was separately prepared duly authenticated by water management officer, where maximum water saving interventions were applied. Ten improved watercourses where maximum (5 or 6 out of 10 water saving irrigation interventions)were found applied, were selected by using Randomizer.com pathway from each Tehsil, thus total 30 improved watercourses were taken where maximum water saving irrigation interventions were applied. From these 30 watercourses 9 small farmers (having landholding<12.5 acres) were selected randomly from each watercouse, 3 from Head, Middle and Tail, respectively. Quantitative data were analysed using the Statistical Package for the Social Sciences. Descriptive statistics, including frequencies, percentages, means, standard deviations and rank orders were used to summarize different variables. Chi-square, Contingency Coefficient test was also used to find out the association and degree of association between dependent and independent variables. The adoption level of farmers regarding water saving irrigation was 90%and increase in wheat yield was significantly affected. Overall the results of the data show that adoption of the water saving interventions affected the income of the respondents. Furthermore the adoption of water saving interventions as well as wheat sowing recommendations also affected upon the socio economic conditions of the respondents. There also existed significant association among different independent and dependent attributes.