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Ehud Duchovni

Weizmann Institute of Science, Particles, Department Member

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Ehud Duchovni CV

A: Personal details:
Born: March 25th 1953, Tel-Aviv.
Citizenship: Israeli
Military service: Aug 71-Aug 74
Decoration: Ot Ha-Oz (Medal of Bravery) 1982
Verdienstkreuz am Band (Cross of Merit) 1983
Status: Married + 4+5

Education
B.Sc. in Physics: 1978 Tel-Aviv University
M.Sc. in Particle Physics 1980 Weizmann Institute of Science
Ph.D. in Particle Physics 1984 Weizmann Institute of Science

Employment:
Research Associate 1984-7 CERN
Senior Scientist 1987-92 Weizmann Institute of Science
Associate Prof. 1992-2012 Weizmann Institute of Science
Scientific, Associate 1992-3 CERN
Scientific, Associate 1997 CERN
Visiting Prof. 2000 University of Alberta, Edmonton
Professor 2012 Weizmann Institute of Science

Prizes:
Levinson 1992
Enrico Segre award 2010

Contact:
Mailing Address: Bar-Kochva 115/31 Herzeliya 4600721
Phone: +972(09)-9575866, +972(0)50-8867001, fax +972(09)-9585564,
e-mail: [email protected]
Home page: http://www.weizmann.ac.il/physics/staff/duchovni.htm (not updated)
Phone: 508867001
Address: Bar Kochva 115 Herzliya 4600721 Israell

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Papers by Ehud Duchovni

Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector

The European Physical Journal C, 2011

Search for New Phenomena intt¯Events with Large Missing Transverse Momentum in Proton-Proton Collisions ats=7 TeVwith the ATLAS Detector

Physical Review Letters, 2012

A search for new phenomena in t " t events with large missing transverse momentum in proton-proto... more A search for new phenomena in t " t events with large missing transverse momentum in proton-proton collisions at a center-of-mass energy of 7 TeV is presented. The measurement is based on 1:04 fb À1 of data collected with the ATLAS detector at the LHC. Contributions to this final state may arise from a number of standard model extensions. The results are interpreted in terms of a model where new top-quark partners are pair produced and each decay to an on-shell top (or antitop) quark and a long-lived undetected neutral particle. The data are found to be consistent with standard model expectations. A limit at 95% confidence level is set excluding a cross section times branching ratio of 1.1 pb for a top-partner mass of 420 GeV and a neutral particle mass less than 10 GeV. In a model of exotic fourth generation quarks, toppartner masses are excluded up to 420 GeV and neutral particle masses up to 140 GeV.

Measurement of the inelastic proton–proton cross-section at √s=7 TeV with the ATLAS detector

Nature Communications, 2011

The dependence of the rate of proton-proton interactions on the centre-of-mass collision energy, ... more The dependence of the rate of proton-proton interactions on the centre-of-mass collision energy, √s, is of fundamental importance for both hadron collider physics and particle astrophysics. The dependence cannot yet be calculated from first principles; therefore, experimental measurements are needed. Here we present the first measurement of the inelastic proton-proton interaction cross-section at a centre-of-mass energy, √s, of 7 TeV using the ATLAs detector at the Large Hadron Collider. Events are selected by requiring hits on scintillation counters mounted in the forward region of the detector. An inelastic crosssection of 60.3 ± 2.1 mb is measured for ξ > 5×10 − 6 , where ξ is calculated from the invariant mass, M X , of hadrons selected using the largest rapidity gap in the event. For diffractive events, this corresponds to requiring at least one of the dissociation masses to be larger than 15.7 GeV.

Search for Pair Production of a Newb′Quark that Decays into aZBoson and a Bottom Quark with the ATLAS Detector

Physical Review Letters, 2012

A search is reported for the pair production of a new quark b 0 with at least one b 0 decaying to... more A search is reported for the pair production of a new quark b 0 with at least one b 0 decaying to a Z boson and a bottom quark. The data, corresponding to 2:0 fb À1 of integrated luminosity, were collected from pp collisions at ffiffi ffi s p ¼ 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b 0 candidates is tested for an enhancement. No evidence for a b 0 signal is detected in the observed mass distribution, resulting in the exclusion at a 95% confidence level of b 0 quarks with masses m b 0 < 400 GeV that decay entirely via b 0 ! Z þ b. In the case of a vectorlike singlet b 0 mixing solely with the third standard model generation, masses m b 0 < 358 GeV are excluded.

Search for a Standard Model Higgs Boson in theH→ZZ→ℓ+ℓ−νν¯Decay Channel with the ATLAS Detector

Physical Review Letters, 2011

A search for a heavy standard model Higgs boson decaying via H ! ZZ ! ' þ ' À " , where ' ¼ e, , ... more A search for a heavy standard model Higgs boson decaying via H ! ZZ ! ' þ ' À " , where ' ¼ e, , is presented. It is based on proton-proton collision data at ffiffi ffi s p ¼ 7 TeV, collected by the ATLAS experiment at the LHC in the first half of 2011 and corresponding to an integrated luminosity of 1:04 fb À1. The data are compared to the expected standard model backgrounds. The data and the background expectations are found to be in agreement and upper limits are placed on the Higgs boson production cross section over the entire mass window considered; in particular, the production of a standard model Higgs boson is excluded in the region 340 < m H < 450 GeV at the 95% confidence level.

Searches for neutral Higgs bosons in e< sup>+</sup> e< sup>−</sup> collisions at centre-of-mass energies from 192 to 202 GeV

Physics Letters B, Feb 1, 2001

Searches for neutral Higgs bosons are performed with the 237 pb− 1 of data collected in 1999 by t... more Searches for neutral Higgs bosons are performed with the 237 pb− 1 of data collected in 1999 by the ALEPH detector at LEP, for centre-of-mass energies between 191.6 and 201.6 GeV. These searches apply to Higgs bosons within the context of the Standard Model and its minimal supersymmetric extension (MSSM) as well as to invisibly decaying Higgs bosons. No evidence of a signal is seen. A lower limit on the mass of the Standard Model Higgs boson of 107.7 GeV/c2 at 95% confidence level is set. In the MSSM, lower limits of 91.2 ...

Analysis of the XENON100 dark matter search data

The XENON100 experiment, situated in the Laboratori Nazionali del Gran Sasso, aims at the direct ... more The XENON100 experiment, situated in the Laboratori Nazionali del Gran Sasso, aims at the direct detection of dark matter in the form of weakly interacting massive particles (WIMPs), based on their interactions with xenon nuclei in an ultra low background dual-phase time projection chamber. This paper describes the general methods developed for the analysis of the XENON100 data. These methods have been used in the 100.9 and 224.6 live days science runs from which results on spin-independent elastic, spin-dependent elastic and inelastic WIMP-nucleon cross-sections have already been reported.

$Research paper thumbnail of Search for lepton flavour violation in the eμ continuum with the ATLAS detector in $\sqrt{s} = 7~\mbox{TeV}$ pp collisions at the LHC$

Search for lepton flavour violation in the eμ continuum with the ATLAS detector in $\sqrt{s} = 7~\mbox{TeV}$ pp collisions at the LHC

The European Physical Journal C, 2012

This paper presents a search for the t-channel exchange of an R-parity violating scalar top quark... more This paper presents a search for the t-channel exchange of an R-parity violating scalar top quark (t) in the e ± μ ∓ continuum using 2.1 fb −1 of data collected by the ATLAS detector in √ s = 7 TeV pp collisions at the Large Hadron Collider. Data are found to be consistent with the expectation from the Standard Model backgrounds. Limits on R-parity-violating couplings at 95 % C.L. are calculated as a function of the scalar top mass (mt). The upper limits on the production cross section for pp → eμX, through the t-channel exchange of a scalar top quark, ranges from 170 fb for mt = 95 GeV to 30 fb for mt = 1000 GeV.

Search for supersymmetry in events with photons and low missing transverse energy in pp collisions at http://ars. els-cdn. com/content/image/http://origin-ars. els-cdn. com/content/image/1-s2. 0-S0370269312013081-si1. gif"/>

Physics Letters B, Dec 28, 2012

Many models of new physics, including versions of supersymmetry (SUSY), predict production of eve... more Many models of new physics, including versions of supersymmetry (SUSY), predict production of events with low missing transverse energy, electroweak gauge bosons, and many energetic final-state particles. The stealth SUSY model yields this signature while conserving R-parity by means of a new hidden sector in which SUSY is approximately conserved. The results of a general search for new physics, with no requirement on missing transverse energy, in events with two photons and four or more hadronic jets are reported. ...

$Research paper thumbnail of Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at $\sqrt{s}$ = 7 TeV with the ATLAS detector$

Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at $\sqrt{s}$ = 7 TeV with the ATLAS detector

A search for direct pair production of supersymmetric top squarks (t 1) is presented, assuming th... more A search for direct pair production of supersymmetric top squarks (t 1) is presented, assuming thet 1 decays into a top quark and the lightest supersymmetric particle,χ 0 1, and that both top quarks decay to purely hadronic final states. A total of 16 (4) events are observed compared to a predicted Standard Model background of 13.5 + 3.7 − 3.6 (4.4 + 1.7 − 1.3) events in two signal regions based on L dt = 4.7 fb −1 of pp collision data taken at √ s = 7 TeV with the ATLAS detector at the LHC. An exclusion region in thet 1 versusχ

Measurement of the ZZ Production Cross Section and Limits on Anomalous Neutral Triple Gauge Couplings in Proton-Proton Collisions at sqrt [s]= 7 TeV with the ATLAS Detector

Physical Review Letters, Jan 25, 2012

A measurement of the ZZ production cross section in proton-proton collisions at ffiffiffi sp ž 7 ... more A measurement of the ZZ production cross section in proton-proton collisions at ffiffiffi sp ž 7 TeV using data corresponding to an integrated luminosity of 1: 02 fb Ā1 recorded by the ATLAS experiment at the LHC is presented. Twelve events containing two Z boson candidates decaying to electrons and/or muons are observed, with an expected background of 0: 3 Æ 0: 3ðstatÞ þ0: 4 Ā0: 3ðsystÞ events. The cross section measured in a phase-space region with good detector acceptance and for dilepton masses within the range 66 to 116 ...

Search for supersymmetric particles in events with lepton pairs and large missing transverse momentum in proton–proton collisions with the ATLAS experiment

The European Physical Journal C-Particles and Fields, Jul 1, 2011

Results are presented of searches for the production of supersymmetric particles decaying into fi... more Results are presented of searches for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons in proton–proton collisions at the Large Hadron Collider. Search strategies requiring lepton pairs with identical-sign or opposite-sign electric charges are described. In a data sample corresponding to an integrated luminosity of 35 pb− 1 collected with the ATLAS detector, no significant excesses are observed. Based on specific benchmark models, ...

Measurement of W-Boson Polarization in Top-Quark Decay in pp [over-bar] Collisions at [sqrt] s= 1.96 TeV

Physical review letters, 2010

We report measurements of the polarization of W bosons from top-quark decays using 2.7 fb À1 of p... more We report measurements of the polarization of W bosons from top-quark decays using 2.7 fb À1 of p" p collisions collected by the CDF II detector. Assuming a top-quark mass of 175 GeV= c 2, three measurements are performed. A simultaneous measurement of the fraction of longitudinal (f0) and right-handed (fþ) W bosons yields the model-independent results f0 ¼ 0: 88 Æ 0: 11ðstatÞ Æ 0: 06ðsystÞ and fþ ¼ À0: 15 Æ 0: 07ðstatÞ Æ 0: 06ðsystÞ with a correlation coefficient of À0: 59. A measurement of f0 [fþ] constraining fþ [f0] to its standard ...

Measurement of W-Boson Polarization in Top-Quark Decay in pp [over-bar] Collisions at [sqrt] s= 1.96 TeV

Physical review letters, 2010

We report measurements of the polarization of W bosons from top-quark decays using 2.7 fb À1 of p... more We report measurements of the polarization of W bosons from top-quark decays using 2.7 fb À1 of p" p collisions collected by the CDF II detector. Assuming a top-quark mass of 175 GeV= c 2, three measurements are performed. A simultaneous measurement of the fraction of longitudinal (f0) and right-handed (fþ) W bosons yields the model-independent results f0 ¼ 0: 88 Æ 0: 11ðstatÞ Æ 0: 06ðsystÞ and fþ ¼ À0: 15 Æ 0: 07ðstatÞ Æ 0: 06ðsystÞ with a correlation coefficient of À0: 59. A measurement of f0 [fþ] constraining fþ [f0] to its standard ...

Measurement of the top quark pair production cross section in pp collisions

Physical Review Letters

CDF Collaboration, F. Abe, Phys. Rev. Lett. 74, 2626 (1995) [CAS][SPIRES][ MEDLINE]; D0 Collabora... more

Search for pair production of a new quark that decays to a Z boson and a bottom quark with the ATLAS detector

A search is reported for the pair production of a new quark, b ′ , with at least one b ′ decaying... more A search is reported for the pair production of a new quark, b ′ , with at least one b ′ decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb −1 of integrated luminosity, were collected from pp collisions at √ s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b ′ candidates is tested for an enhancement. No evidence for a b ′ signal is detected in the observed mass distribution, resulting in the exclusion at 95% confidence level of b ′ quarks with masses m b ′ < 400 GeV that decay entirely via b ′ → Z + b. In the case of a vector-like singlet b ′ mixing solely with the third Standard Model generation, masses m b ′ < 358 GeV are excluded. (c)

The OPAL Collaboration

Search for Pair Production of a Heavy Up-Type Quark Decaying to a W Boson and a b Quark in the lepton+jets Channel with the ATLAS Detector

A search is presented for production of a heavy up-type quark (t ′ ) together with its antipartic... more A search is presented for production of a heavy up-type quark (t ′ ) together with its antiparticle, assuming subsequent decay to a W boson and a b quark, t ′t ′ → W + bW −b . The search is based on 1.04 fb −1 of proton-proton collisions at √ s = 7 TeV collected by the ATLAS detector at the CERN Large Hadron Collider. Data are analyzed in the lepton+jets final state, characterized by a high transverse momentum isolated electron or muon, high missing transverse momentum and at least three jets. No significant excess of events above the background expectation is observed. A 95% C.L. lower limit of 404 GeV is set for the mass of the t ′ quark.

The OPAL Collaboration

$Research paper thumbnail of Search for lepton flavour violation in the $e\mu$ continuum with the ATLAS detector in $\sqrt{s}$ = 7 TeV pp collisions at the LHC$

Search for lepton flavour violation in the $e\mu$ continuum with the ATLAS detector in $\sqrt{s}$ = 7 TeV pp collisions at the LHC

European Physical Journal C, 2012

This paper presents a search for the t-channel exchange of an R-parity violating scalar top quark... more This paper presents a search for the t-channel exchange of an R-parity violating scalar top quark (t) in the e ± µ ∓ continuum using 2.1 fb −1 of data collected by the ATLAS detector in √ s = 7 TeV pp collisions at the Large Hadron Collider. Data are found to be consistent with the expectation from the Standard Model backgrounds. Limits on R-parity-violating couplings at 95% C.L. are calculated as a function of the scalar top mass (mt). The upper limits on the production cross section for pp → eµX, through the t-channel exchange of a scalar top quark, ranges from 170 fb for mt = 95 GeV to 30 fb for mt = 1000 GeV.