Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”
-
Upload
ramona-hopkins -
Category
Documents
-
view
21 -
download
0
description
Transcript of Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”
![Page 1: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/1.jpg)
Constraining gluon distribution in a protonin CMS detector using the process “Z+jet”S. Banerjee, M. Dittmar, M. Guchait, Sangeeta Singh
India-CMS Collaboration Meeting Delhi University, Delhi, 28 Sept. 2007
![Page 2: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/2.jpg)
![Page 3: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/3.jpg)
![Page 4: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/4.jpg)
Reconstruction using datasets in CMSSW_1_3_1Datasets used: /ZmumuJets_Pt_80_120/CMSSW_1_3_1-Spring07-1201/GEN-SIM-DIGI-RECO
CKIN(3) = 80 GeV and CKIN(4) = 120 GeV
![Page 5: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/5.jpg)
Selection cuts used for event selection
Numver of events
7542
7282
4894
4081
3214
Total number of events = 15000
![Page 6: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/6.jpg)
![Page 7: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/7.jpg)
pT and | η| distribution of
Z reconstructed out of
two muons μ+ and μ-
![Page 8: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/8.jpg)
pT and | η| distribution
of muon μ+
![Page 9: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/9.jpg)
pT and | η| distribution of 1st jet
![Page 10: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/10.jpg)
![Page 11: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/11.jpg)
![Page 12: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/12.jpg)
Variation with different PDFs
CTEQ
MRST
Using CMSSW_1_6_0
Number of events = 5000
pT of raw Z
Rapidity of raw Z
![Page 13: Constraining gluon distribution in a proton in CMS detector using the process “Z+jet”](https://reader030.fdocuments.in/reader030/viewer/2022032708/56812ad3550346895d8eb32c/html5/thumbnails/13.jpg)
Future Plan:
Detailed study with LHAPDF.
May be we can include Z → e+e- final state
Background (mainly QCD) need to be estimated
How do the distribution change with higher order effects? Study using
MCFM, MCNLO
Upgrade CMSSW version to CMSSW_1_6_0
Contribute to CSA07
Thank you