Recherche sur splitting flavor

Documentation pour "splitting flavor"

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• ce 2006 10 09 kamor.ethz.ch - 09/12/2010 03:48:59 ...• Silicon Strip Detector 10--14 points • Resolution: Christina Eggel 0 Study of Bs → µ+ µ− in CMS (2006/10/09, Flavor in the era of the LHC) 4 Overview • Search for a very rare decay Clean experimental signature → Efficiency and background reduction • b-hadrons produced in gluon splitting flavor excitation gluon-gluon fusion _ b b µ µ • Background composition two independent semileptonic B decays (mostly from gluon splitting) rare single B decays • Background reduction in analysis 2 final state muons consistent with one decay vertex large (transverse) flight length isolation... Infos PDF : 6/10/2006 - 16 p. - 1.53 Mo - Version HTML

http://kamor.ethz.ch/conf/ce_2006_10_09.pdf

• ce 2008-07-22 kamor.ethz.ch - 09/12/2010 03:51:15 ...Simulation Trigger Reconstruction Tag & Probe Offline Analysis Systematics Results Normalization Production processes 0 Signal: Bs → µ+ µ− arbitrary units arbitrary units arbitrary units 900 800 700 600 500 400 300 200 100 0 0 10 20 30 p 40 T, B Background: bb → µ+ µ− + X gluon splitting flavor excitation gluon-gluon fusion gluon splitting flavor excitation gluon-gluon fusion 1200 1000 800 600 400 200 0 arbitrary units 50000 40000 30000 20000 10000 0 22000 20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0 0 2 4 6 gluon splitting flavor excitation gluon-gluon fusion 50 [GeV]... Infos PDF : 22/07/2008 - 36 p. - 1.9 Mo - Version HTML

http://kamor.ethz.ch/pres/ce_2008-07-22.pdf

• as 2006-07-21 kamor.ethz.ch - 09/12/2010 03:53:02 ...0.8 1 A. Starodumov 0 Discovery potential for Bs → µ+ µ− Introduction Event simulation Trigger and Event selection Systematics Results and Conclusion Backup Samples Signal Background Signal events: composition arbitrary units arbitrary units 400 350 300 250 200 150 100 50 0 0 10 20 gluon splitting flavor excitation gluon-gluon fusion 180 160 140 120 100 80 60 40 20 arbitrary units 0 2 4 6 8 10 12 14 IV 450 220 200 300 250 200 150 100 50 0 0 0.5 1 1.5 2 R µµ 30 40 50 pT, B [GeV] 0 A. Starodumov 0 Discovery potential for Bs → µ+ µ− Introduction Event simulation Trigger and Event... Infos PDF : 20/07/2006 - 22 p. - 0.68 Mo - Version HTML

http://kamor.ethz.ch/pres/2006/as_2006-07-21.pdf

• ul 2006-07-28 kamor.ethz.ch - 09/12/2010 03:49:16 ... 10--15 µm • Silicon Strip Detector 10--14 points • Resolution: Urs Langenegger 0 Study of Bs → µ+ µ− in CMS (2006/07/28, XXXIII ICHEP 2006) 4 Overview • Search for a very rare decay Clean experimental signature → Efficiency and background reduction • b-hadrons produced in gluon splitting flavor excitation gluon-gluon fusion _ b b µ µ • Background composition two independent semileptonic B decays (mostly from gluon splitting) rare single B decays • Background reduction in analysis 2 final state muons consistent with one decay vertex large (transverse) flight length isolation... Infos PDF : 5/08/2006 - 14 p. - 1.5 Mo - Version HTML

http://kamor.ethz.ch/conf/ul_2006-07-28.pdf

• ul 2006-12-11 kamor.ethz.ch - 09/12/2010 03:48:52 ...10× larger than at Tevatron Events can be triggered at high luminosity Urs Langenegger 0 Study of Bs → µ+ µ− in CMS (2006/12/11, CMS around Zurich) 2 Overview • Search for a very rare decay Clean experimental signature → Efficiency and background reduction • b-hadrons produced in gluon splitting flavor excitation gluon-gluon fusion _ b b µ µ • Background composition two independent semileptonic B decays (mostly from gluon splitting) rare single B decays • Background reduction in analysis 2 final state muons consistent with one decay vertex large (transverse) flight length isolation... Infos PDF : 11/12/2006 - 10 p. - 0.28 Mo - Version HTML

http://kamor.ethz.ch/conf/ul_2006-12-11.pdf

• ul 2006-06-23 kamor.ethz.ch - 09/12/2010 03:53:08 ...moved to different preselection Origin private σvis[f b] 1.74E + 07 Ngen 6.35E9 L[ fb−1] 6.54E − 04 Nana 11397 Urs Langenegger 0 Status of Bs → µ+ µ− Search (2006/06/23, SM Meeting) 4 Background Processes • Gluon-gluon fusion is NOT the dominant process Relative fractions of Gluon splitting Flavor excitation ratio ratio 1 0.9 0.8 0.7 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 10 20 30 40 50 60 pT [GeV] ratio 0 0 0.2 0.4 0.6 0.8 1 iso ratio 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.2 0.4 0.6 0.8 1 0 iso 0 2 4 6 8 10 isoveto Gluon-gluon fusion ratio 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0... Infos PDF : 23/06/2006 - 17 p. - 0.43 Mo - Version HTML

http://kamor.ethz.ch/pres/2006/ul_2006-06-23.pdf