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Hadronic Cross Sections of B C Mesons

Thesis Info

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Author

Faisal Akram

Program

PhD

Institute

University of the Punjab

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2013

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2376/1/3004S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726355842

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In this work we calculate B c absorption cross sections by light mesons and baryons; π, ρ , and K mesons and nucleons. The processes studied are important from the view of relativistic heavy-ion experiments. The formalism used for the calculations is based on an effective hadronic Lagrangian developed by imposing SU(5) symmetry. This approach is similar to other papers in the literature in which absorption cross sections of J/ψ and Υ mesons are calculated using the hadronic Lagrangian based on SU(4)/SU(5) symmetry. The motivation for these calculations comes from the studies of the production of heavy mixed flavor mesons and baryons in quark gluon plasma. It is expected that B c production could be enhanced in heavy-ion experiments due to formation of QGP. However, it is also expected that the B c production rate in heavy-ion collisions will be affected by its interaction with comoving hadrons. Thus we require the knowledge of the cross sections of B c absorption processes to interpret the observed rates in the experiments. We find that calculated values of cross sections highly depend upon the choice of form factors, related cutoff parameters, and coupling constants. The effect of uncertainties in these parameters on the cross sections is also studied. These results could be useful in calculating the production rate of B c meson in relativistic heavy-ion collisions.
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۔غزل

غزل ---فرحت شکور(پاکپتن)

مت پوچھ کہ ہم کیسی بلاؤں میں گھرے ہیں
بے یارو مدد گار تیرے چاہنے والے
جینے کا ہمیں حق ہے نہ مرنے کی اجازت
آنکھوں میں کوئی خواب نہ دل میں کوئی خواہش
سینچا ہے لہو دے کے سدا لالہ و گل کو
حسرت ، کبھی نفرت ، کبھی غربت ہمیں بخشی
افلاس و فلاکت کی چلی آندھیاں ہر سو
اے میرے خدا کیوں یہ میرے دیس کے باسی
سچ ، سوچ ، قدم اور قلم محدود ہیں اپنے
ہوتے ہی نہیں پست کبھی حوصلے میرے
لوٹے نہ میرے صاحب اس شہرِ فسوں جا کر
آیا نہ خیال ان کو میری صحرا گری کا
یکسر نہیں میرا ، تو رقیبوں کو مبارک
کیا پوچھتے ہو حالِ دلِ زار ہمارا
کس موڑ پہ لے آیا یہ عشق ہمیں فرحتؔ

 

خوابوں سے جو نکلے تو صداؤں میں گھرے ہیں
صحراؤں کی جاں سوز ہواؤں میں گھرے ہیں
ہم اہلِ وفا کیسی سزاؤں میں گھرے ہیں
ہم زیست کی بے رنگ خلاؤں میں گھرے ہیں
کیوں اہلِ چمن پھر بھی خزاؤں میں گھرے ہیں
ہم لوگ مقدر کی عطاؤں میں گھرے ہیں
کیوں اہلِ وطن اتنی وباؤں میں گھرے ہیں
ڈر خوف کی محبوس فضاؤں میں گھرے ہیں
ہم اہلِ سخن ایسے خداؤں میں گھرے ہیں
شاید کسی اپنے کی دُعاؤں میں گھرے ہیں
کسی دلرُبا کی دلکش اداؤں میں گھرے ہیں
کس زُلفِ گرہ گیر کی چھاؤں میں گھرے ہیں
ہم اہلِ طلب اب کہ اناؤں میں گھرے ہیں
اک یار بے وفا کی جفاؤں میں گھرے ہیں
دُکھ درد کی گھنگھور گھٹاؤں میں گھرے ہیں

Plating versus Ilizarov Technique for Complex Tibial Plateau Fractures: A Comparative Study on Functional Outcome and Patient Satisfaction

ObjectiveTo compare clinical and functional outcomes and complications of open reduction internal fixation (ORIF) by plating and Ilizarov technique in complex tibial plateau fractures. MethodsThis study is a randomized clinical trial accompanying 56 patients having Schatzker type V and VI tibial plateau fractures. We divided patients into two groups for management. Group I; open reduction internal fixation versus Ilizarov technique (Group II). We conducted at the Orthopedics Department, Jinnah post-graduate medical centre, Karachi, from April-2018 to Oct2020. The endpoint assessed patients’ satisfaction and clinical and functional outcomes up to an 18-month follow-up. ResultsThe aetiology of tibial fracture was mainly road traffic accidents (RTA); 17 (70.9%) in ORIF versus 23 (71.8%) in the Ilizarov group. According to clinical outcomes, excellent extension lag was achieved in 100% of patients in both groups. Most patients had excellent knee flexion, thigh atrophy and instability outcomes (54.1% vs 59.37%, 87.5% vs 81.2% and 83.3% vs 87.5%). The functional outcome assessment was done and recorded for 18 months of follow-up. There was no significant difference in normal walking, stair climbing, squatting, jumping and duck walking between the groups. The overall rate of complications was similar; 11 (45.8%) in ORIF versus 17 (53.12%) in the Illizarov group (p-value 0.78). ConclusionOur study concludes that there is an excellent clinical and functional outcome found in both procedures.   DOI: https: //doi. Org/10.59564/amrj/01.01/008

Distributed query processing

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