سارے ایتھے چنگے نیں تے مندا ایتھے کون اے
سارے ایتھے رب نیں تے بندہ ایتھے کون اے
Sūrah al Fātiḥa it is a short Sūrah, yet full of facts and meanings, sweat and heart provoking. This Sūrah is the title of the Qur‘ān and the whole Qur‘ān is its explanation. The fundamental objectives of Qur‘ān, faith and good deeds have been explained in this Sūrah. That is why this Sūrah is also proclaimed as “Umm al Kitāb” and “Umm al Qur‘ān”. Its Scripture is related to worship and help. The worship proceeds to seeking help. The word worship has three meanings: devotion, slavery and submission. Allah Almighty, time and again, ordered towards His submission and worship in the Holy Qur‘ān. It is the esteem of worship on which Allah has honored His Prophet. He is the real Lord and all blessings and powers are for Him. He is Lord of lives and we should have trust in Him and seek help from Him. The separation, individuality and solitude are prohibited in Islam. The verses of Sūrah al Fātiḥa (و ایاک نستعین ایاک نعبد) gives the massage of congregation which is the solution of disturbance and riot. Who so ever wants to go paradise, should have attach to the Ummah.
The CMS experiment at the CERN Large Hadron Collider (LHC) has a redundant muon system composed of three different detector technologies: Cathode Strip Chambers (CSC, in the endcap regions), Drift Tubes (DT, in the barrel region), and Resistive Plate Chambers (RPC, both in the barrel and endcap). The RPC are designed mainly as a trigger detector but they contribute to the muon reconstruction as well. Thus the monitoring and analysis of the system performance are necessary and essential for the final data quality. The main detector characteristics and the hit efficiency and cluster size are presented in this thesis. The stability of the system in the conditions of high instantaneous luminosity and high number of pile up (PU) events are presented in a view of history monitoring and stable trend. RPC background, currents and charge was studies in depth with increasing luminosity and data driven estimations of all these parameters are reported at the extreme conditions of High Luminosity LHC (HL-LHC). First measurement of the top quark pair production cross section ( t t) in proton proton collisions at a center-of-mass energy of 5.02TeV is presented as a second part of this document for 27.4 pb?1 data collected by the CMS experiment at LHC. The measurements are performed by studying events containing at least one charged lepton. The measured cross section ist t= 69:5 6:1 (stat) 5:6 (syst) 1:6 (lumi) pb, with a total relative uncertainty of 12%. The result is in agreement with the expectation from the standard model. The impact of the presented measurement on the determination of the gluon distribution function is investigated.