PhysicsResultsSUS10010 < CMSPublic

CMSPublic Web>PhysicsResults>PhysicsResultsSUS>PhysicsResultsSUS10010 (2011-06-11, KostasTheofilatos) (raw view)

---+ Search for Physics Beyond the Standard Model in Z + MET + Jets events at the LHC

---++ Abstract

This paper presents a new approach for physics beyond the Standard Model searches in final states with a Z boson, jets and missing transverse energy. The Jet-Z Balance method is introduced and used to estimate the total background expected in the signal region directly from the data. First results with a data sample collected with the CMS detector at the LHC are presented. The size of the data sample corresponds to an integrated luminosity of 34 pb<sup>-1</sup>. In the absence of any significant excess beyond the SM expectation, upper limits are set on two benchmark scenarios and further information is provided to allow testing the exclusion of specific models of physics beyond the SM.

---++ Approved Plots from SUS-10-010 (<i> click on plot to get .pdf </i>)

%TABLE{ datavalign="middle" }%
| *Figure * | *Abbreviated Caption* |
| [[%ATTACHURLPATH%/Fig1.pdf][<img src="%ATTACHURLPATH%/Fig1.png" alt="Fig1.png" width=300/>]] | JZB distribution in Z + jets, tt&#773; and SUSY MC simulation, scaled to 34 pb<sup>-1</sup>. The signal distribution corresponds to the SUSY LM4 scenario, scaled by a factor of 20 in cross-section.<BR> [ [[%ATTACHURLPATH%/Fig1.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig2a.pdf][<img src="%ATTACHURLPATH%/Fig2a.png" alt="Fig2a.png" width=300/>]] | Comparison of the predicted background distribution (solid line) and the observed SM background distribution (dots) in the JZB>0 region, in SM MC simulation<BR> [ [[%ATTACHURLPATH%/Fig2a.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig2b.pdf][<img src="%ATTACHURLPATH%/Fig2b.png" alt="Fig2b.png" width=300/>]] | Comparison of the predicted background distribution (solid line) and the observed SM background distribution (dots) in SM MC simulation including a SUSY signal. The true SM background (dotted line) and SUSY signal (dashed line) are also shown separately.<BR> [ [[%ATTACHURLPATH%/Fig2b.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig3a.pdf][<img src="%ATTACHURLPATH%/Fig3a.png" alt="Fig3a.png" width=300/>]] | Ratio of observed to predicted number of events in bins of JZB in the SM MC simulation. The solid red line shows the mean of this ratio, the solid blue line shows the position of unity and the dashed lines show the assigned systematic uncertainty.<BR> [ [[%ATTACHURLPATH%/Fig3a.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig3b.pdf][<img src="%ATTACHURLPATH%/Fig3b.png" alt="Fig3b.png" width=300/>]] | Ratio of observed to predicted number of events in bins of JZB in the ee and &mu;&mu; data sample. The solid red line shows the mean of this ratio, the solid blue line shows the position of unity and the dashed lines show the assigned systematic uncertainty.<BR> [ [[%ATTACHURLPATH%/Fig3b.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig4a.pdf][<img src="%ATTACHURLPATH%/Fig4a.png" alt="Fig4a.png" width=300/>]] | JZB distribution the SF (e<sup>±</sup>e<sup>&#8723;</sup> and &mu;<sup>±</sup>&mu;<sup>&#8723;</sup>) data sample (dots) and in the OF (e<sup>±</sup>&mu;<sup>&#8723;</sup>) data sample (squares).<BR> [ [[%ATTACHURLPATH%/Fig4a.eps][EPS]] ] |
| [[%ATTACHURLPATH%/Fig4b.pdf][<img src="%ATTACHURLPATH%/Fig4b.png" alt="Fig4b.png" width=300/>]] | Comparison of the predicted and observed JZB distributions in the ee and &mu;&mu; data sample. The background prediction has been interpolated to display the &plusmn;&sigma; uncertainty band based on Poisson statistics.<BR> [ [[%ATTACHURLPATH%/Fig4b.eps][EPS]] ] |



---++[[http://cdsweb.cern.ch/record/1354224?ln=en][Link to SUS-10-010 PAS in CDS]]


-- Main.MarcoAndreaBuchmann - 27-May-2011

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	Fig1.pdf	r2 r1	manage	10.4 K	2011-05-27 - 12:35	KostasTheofilatos	typo correction
pdf	Fig3a.pdf	r2 r1	manage	10.9 K	2011-05-27 - 12:52	KostasTheofilatos	typo correction
pdf	Fig3b.pdf	r3 r2 r1	manage	10.9 K	2011-05-27 - 14:09	KostasTheofilatos	typo correction2
pdf	Fig4b.pdf	r2 r1	manage	11.8 K	2011-05-27 - 12:57	KostasTheofilatos	typo correction
eps	Fig1.eps	r2 r1	manage	11.9 K	2011-05-27 - 12:34	KostasTheofilatos	typo correction
eps	Fig3a.eps	r2 r1	manage	12.5 K	2011-05-27 - 12:52	KostasTheofilatos	typo correction
eps	Fig3b.eps	r4 r3 r2 r1	manage	12.8 K	2011-05-27 - 14:09	KostasTheofilatos	typo correction
png	Fig4a.png	r2 r1	manage	13.5 K	2011-05-27 - 12:56	KostasTheofilatos	typo correction
eps	Fig4a.eps	r2 r1	manage	14.0 K	2011-05-27 - 12:55	KostasTheofilatos	typo correction
pdf	Fig2a.pdf	r2 r1	manage	14.1 K	2011-05-27 - 12:45	KostasTheofilatos	typo correction
eps	Fig4b.eps	r2 r1	manage	15.1 K	2011-05-27 - 12:57	KostasTheofilatos	typo correction
png	Fig1.png	r2 r1	manage	15.2 K	2011-05-27 - 12:37	KostasTheofilatos	typo correction
pdf	Fig4a.pdf	r2 r1	manage	15.4 K	2011-05-27 - 12:55	KostasTheofilatos	typo correction
png	Fig4b.png	r2 r1	manage	15.8 K	2011-05-27 - 12:58	KostasTheofilatos	typo correction
pdf	Fig2b.pdf	r2 r1	manage	16.3 K	2011-05-27 - 12:51	KostasTheofilatos
png	Fig2a.png	r2 r1	manage	16.5 K	2011-05-27 - 12:46	KostasTheofilatos	typo correction
png	Fig2b.png	r2 r1	manage	17.8 K	2011-05-27 - 12:51	KostasTheofilatos	typo correction
png	Fig3b.png	r3 r2 r1	manage	18.0 K	2011-05-27 - 14:07	KostasTheofilatos	typo correction2
png	Fig3a.png	r2 r1	manage	18.4 K	2011-05-27 - 12:53	KostasTheofilatos	typo correction
eps	Fig2a.eps	r2 r1	manage	18.7 K	2011-05-27 - 12:44	KostasTheofilatos	typo correction
eps	Fig2b.eps	r2 r1	manage	27.5 K	2011-05-27 - 12:50	KostasTheofilatos	typo correction

Topic revision: r7 - 2011-06-11 - KostasTheofilatos

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