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N. Bacchetta

Università degli Studi di Padova, Physics, Faculty Member

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Aix-Marseille University

Alexandra Vásquez

Universidad Catolica Santo Toribio de Mogrovejo

cecilia gomez hernandez

Centre National de la Recherche Scientifique / French National Centre for Scientific Research

Alberto Ruiz-Jimeno

University of Illinois at Chicago

jasmine jackson

Krzysztof Pozniak

Warsaw University of Technology

Ryszard Romaniuk

Warsaw University of Technology

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Papers by N. Bacchetta

Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at=2.76 TeV

Journal of High Energy Physics, 2014

Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s... more Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s NN = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 µb −1 . The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v 2 to v 6 , are extracted as a function of particle transverse momentum. At higher transverse momentum, the v 2 harmonic becomes significantly smaller than the higher-order v n (n ≥ 3). The p T -averaged v 2 and v 3 are found to be equal within 2%, while higher-order v n decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-byevent fluctuating initial conditions is also presented. Submitted to the Journal of High Energy Physics c 2013 CERN for the benefit of the CMS Collaboration. CC-BY-3.0 license arXiv:1312.1845v1 [nucl-ex]

Lower limit on the top-quark mass from events with two leptons in pp¯ collisions at √s =1.8 TeV

Physical Review Letters, 1992

We present results from searches for the top quark pp¯ collisions at the Fermilab Tevatron Collid... more

Search for Z′→e+e- Using Dielectron Mass and Angular Distribution

Physical Review Letters, 2006

Study of B0 → J/ψK(*)0π+π- Decays with the Collider Detector at Fermilab

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 2002

Search for the Top Quark Decaying to a Charged Higgs Boson in p¯p Collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 1994

We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to ... more We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to a charged Higgs boson (H=). We search for dilepton final states from the decay chain tt HH (or HW, or WW)+ bb ll+ X. In a sample of 19. 3 pb&amp;#x27;collected during 1992—93 with the Collider Detector at Fermilab,~ e observe 2 events with a background estimation of 3. 0~ 1.0 events. Limits at 95% CL in the (M „v, MB-) plane are presented. For the case M „v (M~+ Mt „we exclude at 95% CL the entire (M „v, Mtt-) plane for the branching ratio B (H 7 v) larger ...

Search for First Generation Scalar Leptoquark Pairs in pp¯ Collisions at s=1.8 TeV

Physical Review Letters, 1998

$Research paper thumbnail of Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV$

Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review D, 1999

Further properties of high-mass multijet events at the Fermilab proton-antiproton collider

Physical Review D, 1996

The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider a... more The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider are compared with leading order QCD matrix element predictions, QCD parton shower Monte Carlo predictions, and the predictions from a model in which events are distributed uniformly over the available multibody phase-space. Multijet distributions corresponding to (4N-4) variables that span the N-body parameter space are found to be well described by the QCD calculations for inclusive three-jet, four-jet, and five-jet

Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

Physical Review D, 2002

In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K obse... more In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K observed in pp interactions at a center of mass energy of s 1.8 TeV. These decay modes were observed in a data sample of an integrated luminosity of 110 pb 1, using the decay channels c1 0 (1P)→ J/ and J/→. Here and throughout this paper, reference to a specific state implies the charge-conjugate state as well. The current Particle Data Group values for these branching ratios are based on measurements by ARGUS 1, 2 and CLEO 3, 4 using ...

$Research paper thumbnail of Measurement of sin 2β from B [over→] J/ψK_ {S}^{0} with the CDF detector$

Measurement of sin 2β from B [over→] J/ψK_ {S}^{0} with the CDF detector

Physical Review D, 2000

This paper reports an updated measurement of the standard model CP violation parameter sin 2β usi... more

Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at=2.76 TeV

Journal of High Energy Physics, 2014

Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s... more Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s NN = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 µb −1 . The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v 2 to v 6 , are extracted as a function of particle transverse momentum. At higher transverse momentum, the v 2 harmonic becomes significantly smaller than the higher-order v n (n ≥ 3). The p T -averaged v 2 and v 3 are found to be equal within 2%, while higher-order v n decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-byevent fluctuating initial conditions is also presented. Submitted to the Journal of High Energy Physics c 2013 CERN for the benefit of the CMS Collaboration. CC-BY-3.0 license arXiv:1312.1845v1 [nucl-ex]

Lower limit on the top-quark mass from events with two leptons in pp¯ collisions at √s =1.8 TeV

by G. Busetto, N. Bacchetta, and S. Bertolucci

Physical Review Letters, 1992

We present results from searches for the top quark pp¯ collisions at the Fermilab Tevatron Collid... more

Search for Z′→e+e- Using Dielectron Mass and Angular Distribution

by G. Busetto and N. Bacchetta

Physical Review Letters, 2006

Study of B0 → J/ψK(*)0π+π- Decays with the Collider Detector at Fermilab

by A. Ribon and N. Bacchetta

Physical Review Letters, 2002

Search for the Top Quark Decaying to a Charged Higgs Boson in p¯p Collisions at s=1.8 TeV

by G. Busetto, N. Bacchetta, and S. Bertolucci

Physical Review Letters, 1994

We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to ... more We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to a charged Higgs boson (H=). We search for dilepton final states from the decay chain tt HH (or HW, or WW)+ bb ll+ X. In a sample of 19. 3 pb&amp;#x27;collected during 1992—93 with the Collider Detector at Fermilab,~ e observe 2 events with a background estimation of 3. 0~ 1.0 events. Limits at 95% CL in the (M „v, MB-) plane are presented. For the case M „v (M~+ Mt „we exclude at 95% CL the entire (M „v, Mtt-) plane for the branching ratio B (H 7 v) larger ...

Search for First Generation Scalar Leptoquark Pairs in pp¯ Collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 1998

$Research paper thumbnail of Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV$

Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV

by A. Ribon and N. Bacchetta

Physical Review D, 1999

Further properties of high-mass multijet events at the Fermilab proton-antiproton collider

by A. Ribon and N. Bacchetta

Physical Review D, 1996

The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider a... more The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider are compared with leading order QCD matrix element predictions, QCD parton shower Monte Carlo predictions, and the predictions from a model in which events are distributed uniformly over the available multibody phase-space. Multijet distributions corresponding to (4N-4) variables that span the N-body parameter space are found to be well described by the QCD calculations for inclusive three-jet, four-jet, and five-jet

Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

by A. Ribon and N. Bacchetta

Physical Review D, 2002

In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K obse... more In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K observed in pp interactions at a center of mass energy of s 1.8 TeV. These decay modes were observed in a data sample of an integrated luminosity of 110 pb 1, using the decay channels c1 0 (1P)→ J/ and J/→. Here and throughout this paper, reference to a specific state implies the charge-conjugate state as well. The current Particle Data Group values for these branching ratios are based on measurements by ARGUS 1, 2 and CLEO 3, 4 using ...

Measurement of the tt¯ production cross section in pp¯ collisions at s=1.8 TeV

by P. Barbaro, N. Bacchetta, and L. Demortier

Physical Review D, 2001

Measurements of the total and differential cross sections d= dpB Tand d= dyB for B þ mesons produ... more Measurements of the total and differential cross sections d= dpB Tand d= dyB for B þ mesons produced in pp collisions at ffiffiffi sp ž 7 TeV are presented. The data correspond to an integrated luminosity of 5: 8 pbĀ1 collected by the CMS experiment operating at the LHC. The exclusive decay B þ! J= cKþ, with J= c! þ Ā, is used to detect B þ mesons and to measure the production cross section as a function of pB Tand yB. The total cross section for pB T&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; 5 GeV and jyBj&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 2: 4 is measured to be 28: 1 Æ 2: 4 Æ 2: 0 Æ 3: 1 b, where the first ...

Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at=2.76 TeV

Journal of High Energy Physics, 2014

Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s... more Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s NN = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 µb −1 . The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v 2 to v 6 , are extracted as a function of particle transverse momentum. At higher transverse momentum, the v 2 harmonic becomes significantly smaller than the higher-order v n (n ≥ 3). The p T -averaged v 2 and v 3 are found to be equal within 2%, while higher-order v n decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-byevent fluctuating initial conditions is also presented. Submitted to the Journal of High Energy Physics c 2013 CERN for the benefit of the CMS Collaboration. CC-BY-3.0 license arXiv:1312.1845v1 [nucl-ex]

Lower limit on the top-quark mass from events with two leptons in pp¯ collisions at √s =1.8 TeV

Physical Review Letters, 1992

We present results from searches for the top quark pp¯ collisions at the Fermilab Tevatron Collid... more

Search for Z′→e+e- Using Dielectron Mass and Angular Distribution

Physical Review Letters, 2006

Study of B0 → J/ψK(*)0π+π- Decays with the Collider Detector at Fermilab

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 2002

Search for the Top Quark Decaying to a Charged Higgs Boson in p¯p Collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 1994

We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to ... more We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to a charged Higgs boson (H=). We search for dilepton final states from the decay chain tt HH (or HW, or WW)+ bb ll+ X. In a sample of 19. 3 pb&amp;#x27;collected during 1992—93 with the Collider Detector at Fermilab,~ e observe 2 events with a background estimation of 3. 0~ 1.0 events. Limits at 95% CL in the (M „v, MB-) plane are presented. For the case M „v (M~+ Mt „we exclude at 95% CL the entire (M „v, Mtt-) plane for the branching ratio B (H 7 v) larger ...

Search for First Generation Scalar Leptoquark Pairs in pp¯ Collisions at s=1.8 TeV

Physical Review Letters, 1998

$Research paper thumbnail of Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV$

Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review D, 1999

Further properties of high-mass multijet events at the Fermilab proton-antiproton collider

Physical Review D, 1996

The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider a... more The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider are compared with leading order QCD matrix element predictions, QCD parton shower Monte Carlo predictions, and the predictions from a model in which events are distributed uniformly over the available multibody phase-space. Multijet distributions corresponding to (4N-4) variables that span the N-body parameter space are found to be well described by the QCD calculations for inclusive three-jet, four-jet, and five-jet

Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

Physical Review D, 2002

In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K obse... more In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K observed in pp interactions at a center of mass energy of s 1.8 TeV. These decay modes were observed in a data sample of an integrated luminosity of 110 pb 1, using the decay channels c1 0 (1P)→ J/ and J/→. Here and throughout this paper, reference to a specific state implies the charge-conjugate state as well. The current Particle Data Group values for these branching ratios are based on measurements by ARGUS 1, 2 and CLEO 3, 4 using ...

$Research paper thumbnail of Measurement of sin 2β from B [over→] J/ψK_ {S}^{0} with the CDF detector$

Measurement of sin 2β from B [over→] J/ψK_ {S}^{0} with the CDF detector

Physical Review D, 2000

This paper reports an updated measurement of the standard model CP violation parameter sin 2β usi... more

Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at=2.76 TeV

Journal of High Energy Physics, 2014

Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s... more Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at √ s NN = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. A total of about 1.8 million ultra-central events were recorded, corresponding to an integrated luminosity of 120 µb −1 . The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The single-particle anisotropy Fourier harmonics, from v 2 to v 6 , are extracted as a function of particle transverse momentum. At higher transverse momentum, the v 2 harmonic becomes significantly smaller than the higher-order v n (n ≥ 3). The p T -averaged v 2 and v 3 are found to be equal within 2%, while higher-order v n decrease as n increases. The breakdown of factorization of dihadron correlations into single-particle azimuthal anisotropies is observed. This effect is found to be most prominent in the ultra-central PbPb collisions, where the initial-state fluctuations play a dominant role. A comparison of the factorization data to hydrodynamic predictions with event-byevent fluctuating initial conditions is also presented. Submitted to the Journal of High Energy Physics c 2013 CERN for the benefit of the CMS Collaboration. CC-BY-3.0 license arXiv:1312.1845v1 [nucl-ex]

Lower limit on the top-quark mass from events with two leptons in pp¯ collisions at √s =1.8 TeV

by G. Busetto, N. Bacchetta, and S. Bertolucci

Physical Review Letters, 1992

We present results from searches for the top quark pp¯ collisions at the Fermilab Tevatron Collid... more

Search for Z′→e+e- Using Dielectron Mass and Angular Distribution

by G. Busetto and N. Bacchetta

Physical Review Letters, 2006

Study of B0 → J/ψK(*)0π+π- Decays with the Collider Detector at Fermilab

by A. Ribon and N. Bacchetta

Physical Review Letters, 2002

Search for the Top Quark Decaying to a Charged Higgs Boson in p¯p Collisions at s=1.8 TeV

by G. Busetto, N. Bacchetta, and S. Bertolucci

Physical Review Letters, 1994

We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to ... more We presentthe results of a search in pp collisions at+ s= 1. 8 TeV for the top quark decaying to a charged Higgs boson (H=). We search for dilepton final states from the decay chain tt HH (or HW, or WW)+ bb ll+ X. In a sample of 19. 3 pb&amp;#x27;collected during 1992—93 with the Collider Detector at Fermilab,~ e observe 2 events with a background estimation of 3. 0~ 1.0 events. Limits at 95% CL in the (M „v, MB-) plane are presented. For the case M „v (M~+ Mt „we exclude at 95% CL the entire (M „v, Mtt-) plane for the branching ratio B (H 7 v) larger ...

Search for First Generation Scalar Leptoquark Pairs in pp¯ Collisions at s=1.8 TeV

by C. Pagliarone and N. Bacchetta

Physical Review Letters, 1998

$Research paper thumbnail of Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV$

Measurement of b quark fragmentation fractions in the production of strange and light B mesons in pp¯ collisions at s=1.8 TeV

by A. Ribon and N. Bacchetta

Physical Review D, 1999

Further properties of high-mass multijet events at the Fermilab proton-antiproton collider

by A. Ribon and N. Bacchetta

Physical Review D, 1996

The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider a... more The properties of high-mass multijet events produced at the Fermilab proton-antiproton collider are compared with leading order QCD matrix element predictions, QCD parton shower Monte Carlo predictions, and the predictions from a model in which events are distributed uniformly over the available multibody phase-space. Multijet distributions corresponding to (4N-4) variables that span the N-body parameter space are found to be well described by the QCD calculations for inclusive three-jet, four-jet, and five-jet

Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

by A. Ribon and N. Bacchetta

Physical Review D, 2002

In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K obse... more In this paper we report on measurements of the branching ratios of B→ c1 0 (1P) K and B→ J/K observed in pp interactions at a center of mass energy of s 1.8 TeV. These decay modes were observed in a data sample of an integrated luminosity of 110 pb 1, using the decay channels c1 0 (1P)→ J/ and J/→. Here and throughout this paper, reference to a specific state implies the charge-conjugate state as well. The current Particle Data Group values for these branching ratios are based on measurements by ARGUS 1, 2 and CLEO 3, 4 using ...

Measurement of the tt¯ production cross section in pp¯ collisions at s=1.8 TeV

by P. Barbaro, N. Bacchetta, and L. Demortier

Physical Review D, 2001

Measurements of the total and differential cross sections d= dpB Tand d= dyB for B þ mesons produ... more Measurements of the total and differential cross sections d= dpB Tand d= dyB for B þ mesons produced in pp collisions at ffiffiffi sp ž 7 TeV are presented. The data correspond to an integrated luminosity of 5: 8 pbĀ1 collected by the CMS experiment operating at the LHC. The exclusive decay B þ! J= cKþ, with J= c! þ Ā, is used to detect B þ mesons and to measure the production cross section as a function of pB Tand yB. The total cross section for pB T&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; 5 GeV and jyBj&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 2: 4 is measured to be 28: 1 Æ 2: 4 Æ 2: 0 Æ 3: 1 b, where the first ...