CMS

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2017-04-20
17:15
OpenAccess [PUBDB-2017-01744] Book/Report/Dissertation / PhD Thesis
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Search for Supersymmetric Top-Quark Partners Using Support Vector Machines and Upgrade of the Hadron Calorimeter Front-End Readout Control System at CMS
[DESY-THESIS-2017-014]
DESY-THESIS 171 pp., (2017) [10.3204/PUBDB-2017-01744]  GO
In this thesis a search for direct pair production of supersymmetric top-quark partners as well as work on the upgrade of the front-end readout controller of the Hadron Calorimeter (HCAL) of the Compact Muon Solenoid (CMS) experiment are presented. The most appealing extension of the Standard Model (SM) is supersymmetry (SUSY), relating the integer spin (bosons) and half-integer spin elementary particles (fermions). [...]
OpenAccess: Thesis Mehmet Ozgur Sahin - Download fulltextPDF; desy-thesis-17-014.title - Download fulltextPDF;

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2017-03-28
09:42
OpenAccess [PUBDB-2017-01474] Preprint/Report

Charm Production and QCD Analysis at HERA and LHC
[DESY-17-025; arXiv:1612.02371] ddc:530
This review is devoted to the study of charm production in ep and pp collisions. The total set of measurements obtained by the two collaborations H1 and ZEUS from HERA and their combination is outlined, as well as complementary data obtained by the LHCb Collaboration at the LHC. [...]
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2017-03-21
11:43
OpenAccess [PUBDB-2017-01426] Preprint/Report
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Measurement of the cross section for electroweak production of Z$\gamma$ in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at $\sqrt{s} = $ 8 TeV
[CMS-SMP-14-018; CERN-EP-2016-308; arXiv:1702.03025]
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A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at $\sqrt{s} = $ 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. [...]
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2017-03-21
11:30
OpenAccess [PUBDB-2017-01425] Preprint/Report
; ; ; et al
Search for standard model production of four top quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
[CMS-TOP-16-016; CERN-EP-2017-023; arXiv:1702.06164]
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A search for events containing four top quarks $(t\bar{t}t\bar{t})$ is reported from proton-proton collisions recorded by the CMS experiment at $\sqrt{s}$ = 13 TeV and corresponding to an integrated luminosity of 2.6 fb$^{-1}$ The analysis considers the single-lepton (e or $\mu$)+jets and the opposite-sign dilepton ($\mu\mu, \mu^{\pm} e^{\mp}$, or e$^{+}$e$^-$)+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between ttbar-ttbar and ttbar production. [...]
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2017-03-21
11:23
OpenAccess [PUBDB-2017-01424] Preprint/Report
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Search for dark matter produced with an energetic jet or a hadronically decaying W or Z boson at $\sqrt{s} = 13$ TeV
[CMS-EXO-16-037; CERN-EP-2017-031; arXiv:1703.01651]
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A search for dark matter particles is performed using events with large missing transverse momentum, at least one energetic jet, and no leptons, in proton-proton collisions at $\sqrt{s} = 13$ TeV collected with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 12.9 fb$^{-1}$. [...]
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2017-03-21
11:02
OpenAccess [PUBDB-2017-01422] Preprint/Report
; ; ; et al
Measurement of double-differential cross sections for top quark pair production in pp collisions at $\sqrt{s} = 8$ TeV and impact on parton distribution functions
[CMS-TOP-14-013; CERN-EP-2017-030; arXiv:1703.01630]
 GO
Normalized double-differential cross sections for top quark pair $(t\bar{t})$ production are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7 fb$^{-1}$. [...]
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2017-03-21
10:55
OpenAccess [PUBDB-2017-01421] Preprint/Report
; ; ; et al
Measurement of the top quark mass using single top quark events in proton-proton collisions at $\sqrt{s} = 8$ TeV
[CMS-TOP-15-001; CERN-EP-2017-012; arXiv:1703.02530]
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A measurement of the top quark mass is reported in events containing a single top quark produced via the electroweak t channel. The analysis is performed using data from proton-proton collisions collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb$^{-1}$. [...]
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2017-03-21
10:46
OpenAccess [PUBDB-2017-01420] Preprint/Report
; ; ; et al
Search for the third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at $\sqrt{s} = 13$ TeV
[CMS-EXO-16-023; CERN-EP-2017-025; arXiv:1703.03995]
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A search is performed for third-generation scalar leptoquarks and heavy right-handed neutrinos in events containing one electron or muon, one hadronically decaying $\tau$ lepton, and at least two jets, using a $\sqrt{s} = 13$ TeV pp collision data sample corresponding to an integrated luminosity of 12.9 fb$^{-1}$ collected with the CMS detector at the LHC in 2016. The number of observed events is found to be in agreement with the standard model prediction [...]
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2017-03-21
10:38
OpenAccess [PUBDB-2017-01419] Preprint/Report
; ; ; et al
Search for associated production of dark matter with a Higgs boson decaying to $b\bar{b}$ or $\gamma\gamma$ at $\sqrt{s} = 13$ TeV
[CMS-EXO-16-012; CERN-EP-2017-027; arXiv:1703.05236]
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A search for dark matter is performed using events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons. The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 2.3 fb$^{-1}$. [...]
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2017-03-21
10:23
OpenAccess [PUBDB-2017-01418] Preprint/Report
; ; ; et al
Search for anomalous couplings in boosted WW/WZ $\to \ell \nu q\bar{q}$ production in proton-proton collisions at $\sqrt{s} = 8$ TeV
[CMS-SMP-13-008; CERN-EP-2017-029; arXiv:1703.06095]
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This Letter presents a search for new physics manifested as anomalous triple gauge boson couplings in WW and WZ diboson production in proton-proton collisions. The search is performed using events containing a W boson that decays leptonically and a W or Z boson whose decay products are merged into a single reconstructed jet. [...]
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