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Jet Production in Hadron-Hadron Collisions at High Energies

Thesis Info

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Author

Zaman, Ali

Program

PhD

Institute

COMSATS University Islamabad

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2016

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/7490/1/Ali_Zaman_Physics_2016_HSR_CIIT_01.09.2016.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726564767

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Jet Production in Hadron-Hadron Collisions at High Energies We investigated the effects of jet production on the following parameters: multiplicity, pseudorapidity, transverse momentum and transverse mass distributions of charged particles produced in hadron-hadron collisions at 1.8 TeV, centre of mass energy, using the Dubna version of HIJING model. These distributions are analyzed for the whole range and for six selected regions of the polar angle (angle of the secondary particles with respect to the beam axis) as a function of number of jets. The results for the charged particles multiplicity distributions were compared with experimental ones coming from the SPS and Tevatron experiments and the increase in the multiplicity of the charged particles influenced by multi-jet events is discussed. The results for pseudorapidity distributions are interpreted and discussed in connection to the increase observed in the multiplicity of charged particles as a result of its multi-jet dependence and are also discussed in comparison with the experimental results coming from the CDF Collaboration. The analysis of effect of the multi-jet events on the transverse momentum and transverse mass distributions is also discussed in connection to the increase in the multiplicity and pseudorapidity density of charged particles. We concluded that high multiplicity regions, the increased pseudorapidity density and the high pT regions correspond mainly to the multi-jet events.
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مولانا ابوالحسن علی ندوی

آہ! مولانا سید ابوالحسن علی ندویؒ
یہ بات کس طرح دل میں اتاری جائے کہ عالم اسلام کی سب سے زیادہ معتبر اورمعروف ومشہور شخصیت حضرت مولانا سید ابوالحسن ندوی اب اس دنیا میں نہیں رہے ہیں، وہ۳۱/دسمبر۱۹۹۹ء کوانتقال فرماگئے ہیں۔ اناﷲ واناالہ راجعون۔ یہ بات اب بات نہیں رہی ہے حقیقت ہوچکی ہے اورحقیقت کوکسی بھی طرح جھٹلایا نہیں جاسکتاہے اورجب یہ حقیقت ہے کہ حضرت مولاناسید ابوالحسن علی ندوی اس دنیا سے ہم سب کو چھوڑ کرچلے گئے ہیں توہمارے لیے رونے کے علاوہ کوئی چارہ ہی نہیں رہاہے۔رونا اس لیے ہے کہ اس دنیا میں ایک وہ ہی ہستی ایسی بچی تھی جوصرف اورصرف اسلام اورانسانیت کے لیے مستعد عمل تھی۔ جس نے اپنی پوری حیات میں اپنے لیے کچھ نہ پا کرپوری انسانیت کے لیے سب کچھ کیا، اپنی تمام ترتوانائیوں کواسلام کی سربلندی اورانسانیت کی بہتری و فلاح کے لیے صرف کیا۔مولانا سید ابوالحسن علی ندوی کے انتقال کوہم بیسویں صدی کاسب سے بڑا المیہ ہی کہیں گے۔اس پرفتن ماحول میں وہ شرافت میں یکتاتھے، انسانیت میں منفرد تھے، اخلاق وتہذیب اورتمدن عالم انسانیت کے لیے فقید المثال تھے، رواداری ووضعداری میں ان کی زندگی ایک نمونہ تھی، تقویٰ وطہارت میں انہیں امتیازی خصوصیات حاصل تھیں۔ سادگی ان کااوڑنا بچھونا تھی، دوسروں کے لیے ان کے یہاں سب کچھ تھا ضرورت مندوں،حاجت مندوں کے لیے وہ بادشاہ تھے، لیکن اپنے لیے وہ کچھ نہ تھے انہوں نے اپنی زندگی کو دوسروں کی خدمت، انسانیت کی فلاح اوراسلام مذہب کی آبیاری کے لیے وقف کررکھا تھا۔ وہ اپنے آپ میں ایک انجمن تھے ان میں اسلامی تعلیمات کی صحیح معنوں میں تمام ہی خصوصیات تھیں۔ان کی ہربات میں اسلامیت جھلکتی تھی۔ وہ دورصحابہؓ کی تمام خصوصیات و اچھائیوں اورخوبیوں کے حامل تھے۔
ان کی وفات سے ایسا محسوس ہورہا ہے کہ انسانیت کی...

أوهام الإمام البزار فى الأسانيد والرجال من خلال مسنده البحر الزخار

Indeed، the Sunnah of the Prophet (peace be upon him) is the second sources of Islamic Shariah. It is the sacred knowledge after the Holy Qur’an. It consists of sayings، actions and approvals of the Prophet (peace be upon him). The science of Jarh wa al-Ta’deel (narrator criticism and evaluation) is an important science for the protection of Sunnah. This science comprehensively draws differences of Saḥīḥ from Dha’īf. The religious scholars have started working on Jarh wa al-Ta’deel from the time of companions and successors. Among them a great Moḥaddis was Imām Abu Bakr  Ahmad bin ‘Amr Baẓẓār. He has written the book، “Al-Musnad Al-Bahar Al-Ẓakhkhār”. This book consists of a huge compilation of Aḥadīth and its science. Imām Bazzār has discussed about Asānīd، Ahwāl Rijāl، Ilal Aḥadīth، Mutābi’āt and Tafarradāt. He had adopted a unique research methodology، however، he was among lenient Imāms of Jarh wa al-Ta’deel. Sometimes، he misunderstood reporters and reports. This article attempts to analyze his methodology as a lenient Imām while discussing chains of reporters and reporters of Aḥadīth. This study uses a critical and comparative research methodology to investigate reporters and reports and will be beneficial for researchers and scholars in the field of Hadith and its Sciences.

Genetic Basis of Various Morpho-Physiological Traits in Zea Mays L. under Heat Stress

Fifty inbreds of maize from diverse origin were screened in the growth-chamber and glass-house for seedling parameters under both normal and high temperature regimes. Six parental lines were earmarked on the basis of various agro- physiological seedling traits under high temperature stress. The parental lines were sown in the field using diallel mating design to make all possible cross combinations. The parents, F1’s and their reciprocals were sown in the field in two sets using a triplicate RCBD. Normal irrigations were applied to both sets of experiment. Normal experiment was sown on Feb. 8th, whereas stress experiment was sown on March 8th. Data pertaining to various morpho-physiological parameters were recorded at different crop growth stages and subjected to statistical analysis. Significant mean square values for all the parameters under normal and heat stress environments revealed considerable genetic variability. Scaling tests were performed to check adequacy of data for analyzing additive-dominance model. Under both temperature regeims, all traits except RCI (fully inadequate) were fully adequate to additive-dominance model. Inheritance of all agro-physiological parameters was influenced by overdominant type of genetic effects as male × female interaction was also found significant for all parameters under both temperature regimes. Significant mean square values were observed for GCA & SCA effects under optimal and stress conditions in maize. Existence of highly significant GCA and SCA effects revealed that trait inheritance was controlled by additive, dominance and over-dominance type of genetic attributes under optimal and high temperature regimes. Reciprocal effects were highly significant for DTS, OP, PH, DTM, GDDs to 50 % silking and GDDs to 50 % maturity under optimal environmental conditions, while under stress environment significant reciprocal attributes were expressed by DTS, ELA, OP, PH, GDDs to 50 % silking and GDDs to 50 % maturity, depicting that inheritance of these traits is influenced by maternal or cytoplasmic contents. Magnitude of SCA variance was higher than GCA variance for all studied traits under both temperature regimes, due to which GCA/SCA variance ratio was less than unity indicating that all parameters were controlled by non-additive (dominance & over-dominance) type of genetic effects except leaf osmotic potential, whose inheritance was influenced by partial dominance type of genetic attributes under high temperature. Inbred lines D-103, NCIL-20-4 and NCIL-10-5 were best suited early maturing inbreds under both environments. Inbred lines NCIL-10-5, D-135 and NCIL-20-4 earmarked as high yielding parents under both temperature regimes. Three F1 crosses D-103 × NCIL-30-5, NCIL-20-4 × NCIL-10-5 and NCIL-10-5 × NCIL-30-5 were tagged as best combiners for most of the physiological, grain yield and yield related parameters under both environmental conditions. Heterotic estimates were studied for all traits under normal and high temperature. Under normal and heat stress environment, cross combinations D-103 × NCIL-30-5, NCIL-20-4 × NCIL-10-5 (its reciprocal) and NCIL-20-4 × WA3748 expressed maximal HP heterosis estimates for grain yield. Pioneer hybrid P-1543 used as commercial check to estimate standard heterosis for GPE, 100-KW and grain yield per plant under both environmental conditions. Results revealed cross combinations NCIL-20-4 × NCIL-10-5, its reciprocal and NCIL-10-5 × NCIL-30-5 as best F1’s due to their high performance over commercial hybrid. Under both temperature regimes, all seedling parameters were significantly interrelated with each other except root-shoot ratio. Under optimal and heat stress growth conditions in the field, agronomic parameters showed significant correlation with grain yield except days to 50 % tasseling, days to 50 % silking, ASI and days to 50 % maturity. All physiological parameters showed significant interrelation with grain yield except GDDs to tasseling, silking, GDDs between anthesis-silking and maturity.