# CERN Preprints

2016-02-10
12:29
 Measurement of the difference of time-integrated CP asymmetries in $D^0 \rightarrow K^{-} K^{+}$ and $D^0 \rightarrow \pi^{-} \pi^{+}$ decays A search for CP violation in $D^0 \rightarrow K^{-} K^{+}$ and $D^0 \rightarrow \pi^{-} \pi^{+}$ decays is performed using $pp$ collision data, corresponding to an integrated luminosity of $3~fb^{-1}$, collected using the LHCb detector at centre-of-mass energies of 7 and 8$~$TeV. [...] CERN-EP-2016-022 ; LHCB-PAPER-2015-055. - 2016. Fulltext - Previous draft version - Related data file(s)

2016-02-10
09:38
 Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at $\sqrt{s}=$ 8 TeV Results are reported from a search for the top squark $\tilde{t}_1$, the lighter of the two supersymmetric partners of the top quark. [...] CERN-EP-2016-004 ; CMS-SUS-14-015-003. - 2016. Additional information for the analysis - CMS AuthorList - Fulltext

2016-02-09
11:17
 Searches for high mass resonances in dilepton and diphoton final states / Charaf, Otman (Alabama U.) /ATLAS and CMS Collaborations The search for new physics at the TeV scale is one of the major aspects of the ATLAS and CMS experimental programmes. This includes a myriad of theoretical models involving resonances that can can decay to leptons or photons. [...] CMS-CR-2015-374.- Geneva : CERN, 2015 - 10 p. Fulltext: PDF; In : 3rd Annual Large Hadron Collider Physics Conference, St. Petersburg, Russia, 31 Aug - 5 Sep 2015

2016-02-09
11:15
 Searches for heavy stable charged particles and other exotic signatures with large ionization at the LHC / Kazana, Malgorzata (NCBJ, Swierk) /ATLAS and CMS Collaborations The signature of the large ionization is used to search for signals of heavy stable charged particles or other new particles foreseen by models beyond the Standard Model. The related searches in proton-proton collisions at the Large Hadron Collider (LHC) are reviewed. [...] CMS-CR-2016-003.- Geneva : CERN, 2016 - 7 p. Fulltext: PDF; In : 3rd Annual Large Hadron Collider Physics Conference, St. Petersburg, Russia, 31 Aug - 5 Sep 2015

2016-02-09
11:15
 Particle Spectra in Minimum Bias events at 13 TeV / Grados Luyando, Juan Manuel (DESY) /CMS Collaboration Measurements of particle spectra at 13 TeV are presented for different event topologies.. CMS-CR-2016-017.- Geneva : CERN, 2016 - 6 p. Fulltext: PDF; In : 7th International Workshop on Multiple Partonic Interactions at the LHC, Miramare, Trieste, Italy, 23 - 27 Nov 2015

2016-02-09
11:14
 CMS Underlying Event and Double Parton Scattering Monte Carlo Tunes / Sunar Cerci, Deniz (Cukurova U.) /CMS Collaboration Three new PYTHIA 8 underlying event (UE) tunes are presented, one using the CTEQ6L1 parton distribution function (PDF), one using HERAPDF1.5LO, and one using the NNPDF2.3LO PDF; two new PYTHIA 6 UE tunes, one for the CTEQ6L1 PDF and one for the HERAPDF1.5LO, and one new HERWIG++ UE tune for the CTEQ6L1 PDF are also available. Simultaneous fits to CDF UE data at center-of-mass energies of 0.3, 0.9, and 1.96 TeV, together with CMS UE data at 7 TeV, check the UE models and constrain their parameters, providing thereby more precise predictions for proton-proton collisions at 13 TeV. [...] CMS-CR-2016-019.- Geneva : CERN, 2016 - 5 p. Fulltext: PDF; In : 7th International Workshop on Multiple Partonic Interactions at the LHC, Miramare, Trieste, Italy, 23 - 27 Nov 2015

2016-02-09
11:14
 MPI and UE corrections to jet measurements and influence on PDF determination and $\alpha_s$ / Cerci, Salim (Cukurova U.) /CMS Collaboration The UE and MPI contributions and corrections to jet measurements will be presented, as well as an estimate on the uncertainties. In addition, the influence from initial and final state parton shower will be discussed.. CMS-CR-2016-020.- Geneva : CERN, 2016 - 5 p. Fulltext: PDF; In : 7th International Workshop on Multiple Partonic Interactions at the LHC, Miramare, Trieste, Italy, 23 - 27 Nov 2015

2016-02-09
11:14
 Multi-jet measurements at CMS / Safronov, Grigory (Moscow, ITEP) /CMS Collaboration The cross section of hadronic jet production gives direct access to the basic QCD components like the strong coupling constant, $\alpha_s$, or the parton density functions. Measurements of correlations between jets allow to test pQCD resummation procedures or parton shower models. [...] CMS-CR-2016-023.- Geneva : CERN, 2016 - 8 p. Fulltext: PDF; In : 7th International Workshop on Multiple Partonic Interactions at the LHC, Miramare, Trieste, Italy, 23 - 27 Nov 2015

2016-02-09
11:06
 Search for supersymmetry in pp collisions at $\sqrt{s}=$ 8 TeV in final states with boosted W bosons and b jets using razor variables A search for supersymmetry in hadronic final states with highly boosted W bosons and b jets is presented, focusing on compressed scenarios. [...] CERN-EP-2016-008 ; CMS-SUS-14-007-003. - 2016. Additional information for the analysis - CMS AuthorList - Fulltext

2016-02-09
10:51
 ATLAS/CMS Probing PDFs and soft QCD at the LHC / Safronov, Grigory (Moscow, ITEP) /ATLAS and CMS Collaborations LHC has delivered 30 fb$^{-1}$ of proton-proton collisions at center-of-mass energies of 7 and 8 TeV in 2010-2012 during the LHC Run I. Run II has started in 2015 and approximately 200 pb$^{-1}$ of proton-proton collisions at $\sqrt{s}=13$ TeV have been delivered by September. [...] CMS-CR-2015-378.- Geneva : CERN, 2015 - 12 p. Fulltext: PDF; In : 3rd Annual Large Hadron Collider Physics Conference, St. Petersburg, Russia, 31 Aug - 5 Sep 2015