Fragmentation of Jets Produced in Proton-antiproton Collisions at [center of Mass Energy]

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Total Pages : pages
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Book Synopsis Fragmentation of Jets Produced in Proton-antiproton Collisions at [center of Mass Energy] by : Sergo R. Jindariani

Download or read book Fragmentation of Jets Produced in Proton-antiproton Collisions at [center of Mass Energy] written by Sergo R. Jindariani and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: We present the first measurement of two-particle momentum correlations in jets produced in proton-antiproton collisions at center of mass energy of 1.96 TeV. A comparison of the experimental data to theoretical predictions obtained for partons within the framework of resummed perturbative QCD (Next-to-Leading Log Approximation) shows that the predicted parton momentum correlations survive the hadronization stage of jet fragmentation and are present at the hadron level. We also present the measurement of the intrinsic transverse momenta of particles with respect to jet axis (k [subscript T]). Experimental data is compared to the theoretical predictions obtained for partons within the framework of Modified Leading Log Approximation and Next-to-Modified Leading Log Approximation, and shows good agreement in the range of validity of the theoretical predictions. The results of both measurements indicate that the perturbative stage of the jet formation must be dominant and give further support to the hypothesis of Local Parton-Hadron Duality.

Fragmentation of Jets Produced in Proton-Antiproton Collisions at $\sqrt{s}

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ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (982 download)

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Book Synopsis Fragmentation of Jets Produced in Proton-Antiproton Collisions at $\sqrt{s} by :

Download or read book Fragmentation of Jets Produced in Proton-Antiproton Collisions at $\sqrt{s} written by and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first measurement of two-particle momentum correlations in jets produced in p$\bar{p}$ collisions at center of mass energy of 1.96 TeV. A comparison of the experimental data to theoretical predictions obtained for partons within the framework of resummed perturbative QCD (Next-to-Leading Log Approximation) shows that the predicted parton momentum correlations survive the hadronization stage of jet fragmentation and are present at the hadron level. We also present the measurement of the intrinsic transverse momenta of particles with respect to jet axis (kT). Experimental data is compared to the theoretical predictions obtained for partons within the framework of Modified Leading Log Approximation and Next-to-Modified Leading Log Approximation, and shows good agreement in the range of validity of the theoretical predictions. The results of both measurements indicate that the perturbative stage of the jet formation must be dominant and give further support to the hypothesis of Local Parton-Hadron Duality.

Fragmentation Properties of Jets Produced in Proton-antiproton Collisions at Radical S

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ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Fragmentation Properties of Jets Produced in Proton-antiproton Collisions at Radical S by :

Download or read book Fragmentation Properties of Jets Produced in Proton-antiproton Collisions at Radical S written by and published by . This book was released on 1989 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jet fragmentation properties have been studied in collisions of protons and antiprotons at a center-of-mass energy of 1.8 TeV, using the Collider Detector at Fermilab (CDF). The fractional momentum distribution of charged particles within jets is presented and compared with Monte-Carlo predictions. With increasing di-jet invariant mass from 60 to 200 GeV/c2 the fragmentation is observed to soften as predicted by scale breaking effects in Quantum Chromodynamics (QCD). The charged multiplicity in the jet core is observed to rise with di-jet invariant mass. 57 refs.

Fragmentation of Quark and Gluon Jets in Proton-antiproton Collisions at Center-of-mass Energy of 1.8 TeV

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ISBN 13 :
Total Pages : pages
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Book Synopsis Fragmentation of Quark and Gluon Jets in Proton-antiproton Collisions at Center-of-mass Energy of 1.8 TeV by : Alexandre P. Pronko

Download or read book Fragmentation of Quark and Gluon Jets in Proton-antiproton Collisions at Center-of-mass Energy of 1.8 TeV written by Alexandre P. Pronko and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: We report the first model independent measurement of charged particle multiplicities in quark and gluon jets, Nq_ and Ng_, produced at the Tevatron in proton-antiproton collisions with center-of-mass energy 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies 41 and 53 GeV by counting charged particle tracks in cones with opening angle of thetac_=0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q=Ej_et*thetac_ varies in the range from 12 GeV to 25 GeV. At Q=19.2 GeV, the ratio of multiplicities r=Ng_/Nq_ is found to be 1.64"0.17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with re-summed perturbative QCD calculations and are consistent with recent ee− measurements.

An Analysis of Hadronic Jets Produced in Proton-antiproton Collisions at 540 GeV Centre of Mass Energy

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ISBN 13 :
Total Pages : 318 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis An Analysis of Hadronic Jets Produced in Proton-antiproton Collisions at 540 GeV Centre of Mass Energy by : Giordano Angelo Pietro Salvi

Download or read book An Analysis of Hadronic Jets Produced in Proton-antiproton Collisions at 540 GeV Centre of Mass Energy written by Giordano Angelo Pietro Salvi and published by . This book was released on 1984 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Anomalous Production of Photon + Jets + Missing Transverse Energy in Proton-antiproton Collisions at a Center of Mass Energy of 1.96 TeV Using the CDF II Detector

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (787 download)

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Book Synopsis Search for Anomalous Production of Photon + Jets + Missing Transverse Energy in Proton-antiproton Collisions at a Center of Mass Energy of 1.96 TeV Using the CDF II Detector by : Samantha K. Hewamanage

Download or read book Search for Anomalous Production of Photon + Jets + Missing Transverse Energy in Proton-antiproton Collisions at a Center of Mass Energy of 1.96 TeV Using the CDF II Detector written by Samantha K. Hewamanage and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A model-independent signature-based search for physics beyond the Standard Model is performed in the photon + jets + missing transverse energy channel in proton-antiproton collisions at a center of mass energy of 1.96 TeV using the CDF II detector. Events with a photon + jets are predicted by the Standard Model and also by many theoretical models beyond the Standard Model. In the Standard Model, the main mechanisms for photon + jets production include quark-antiquark annihilation and quark-gluon scattering. No intrinsic missing transverse energy is present in any of these Standard Model processes. In this search, photon + [greater-than or equal to] 1 jet and photon + [greater-than or equal to] 2 jet events are analyzed with and without a minimum requirement on the missing transverse energy. Numerous mass distributions and kinematic distributions are studied and no significant excess over the background prediction is found. All results indicate good agreement with expectations of the Standard Model.

Measurement of the Inclusive Jet Cross Section in Proton-antiproton Collisions at the Center-of-mass Energy of 1.96 TeV.

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ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Measurement of the Inclusive Jet Cross Section in Proton-antiproton Collisions at the Center-of-mass Energy of 1.96 TeV. by :

Download or read book Measurement of the Inclusive Jet Cross Section in Proton-antiproton Collisions at the Center-of-mass Energy of 1.96 TeV. written by and published by . This book was released on 2008 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies the high-energy collisions of protons and antiprotons. The data used in the measurement were collected during 2004-2005 with the D0 detector at the Tevatron Collider of the Fermi National Accelerator Laboratory and correspond to 0.7 fb−1 of integrated luminosity. High energy hadron collisions usually produce collimated sprays of particles called jets. The energy of the jets is measured using a liquid Argon-Uranium calorimeter and the production angle is determined with the help of silicon microstrip and scintillating fiber trackers. The inclusive jet cross section in proton-antiproton collisions is measured as a function of jet transverse momentum p{sub T} in six bins of jet rapidity at the center-of-mass energy √s = 1.96 TeV. The measurement covers jet transerve momenta from 50 GeV up to 600 GeV and jet rapidities up to.

Study of the Heavy Flavour Fractions in Z+jets Events from Proton-antiproton Collisions at Energy

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ISBN 13 :
Total Pages : 155 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Study of the Heavy Flavour Fractions in Z+jets Events from Proton-antiproton Collisions at Energy by :

Download or read book Study of the Heavy Flavour Fractions in Z+jets Events from Proton-antiproton Collisions at Energy written by and published by . This book was released on 2008 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Standard Model of field and particles is the theory that provides the best description of the known phenomenology of the particle physics up to now. Data collected in the last years, mainly by the experiments at the big particle accelerators (SPS, LEP, TEVATRON, HERA, SLAC), allowed to test the agreement between measurements and theoretical calculations with a precision of 10−3 ̦ 10−4. The Standard Model is a Quantum Field Theory based on the gauge symmetry group SU(3){sub C} x SU(2){sub L} x U(1){sub Y}, with spontaneous symmetry breaking. This gauge group includes the color symmetry group of the strong interaction, SU(3){sub C}, and the symmetry group of the electroweak interactions, SU(2){sub L} x U(1){sub Y}. The formulation of the Standard Model as a gauge theory guarantees its renormalizability, but forbids explicit mass terms for fermions and gauge bosons. The masses of the particles are generated in a gauge-invariant way by the Higgs Mechanism via a spontaneous breaking of the electroweak symmetry. This mechanism also implies the presence of a massive scalar particle in the mass spectrum of the theory, the Higgs boson. This particle is the only one, among the basic elements for the minimal formulation of the Standard Model, to have not been confirmed by the experiments yet. For this reason in the last years the scientific community has been focusing an increasing fraction of its efforts on the search of the Higgs boson. The mass of the Higgs boson is a free parameter of the Standard Model, but the unitarity of the theory requires values not higher than 1 TeV and the LEP experiments excluded values smaller than 115 GeV. To explore this range of masses is under construction at CERN the Large Hadron Collider (LHC), a proton-proton collider with a center of mass energy of 14 TeV and a 1034 cm−2 s−1 peak luminosity. According to the present schedule, this machine will start to provide collisions for the experiments at the end of 2008. In the meanwhile the only running accelerator able to provide collisions suitable for the search of the Higgs boson is the Tevatron at Fermilab, a proton-antiproton collider with a center of mass energy of 1.96 TeV working at 3 · 1032cm−2s−1 peak luminosity. These features make the Tevatron able for the direct search of the Higgs boson in the 115-200 GeV mass range. Since the coupling of the Higgs boson is proportional to the masses of the particles involved, the decay in b{bar b} has the largest branching ratio for Higgs mass

Study of Substructure of High Transverse Momentum Jets Produced in Proton-Antiproton Collisions at $\sqrt{s}

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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Study of Substructure of High Transverse Momentum Jets Produced in Proton-Antiproton Collisions at $\sqrt{s} by :

Download or read book Study of Substructure of High Transverse Momentum Jets Produced in Proton-Antiproton Collisions at $\sqrt{s} written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Properties of Muons and Jets in Proton-antiproton Collisions at 540 and 630 GeV Centre of Mass Energy

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (911 download)

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Book Synopsis Properties of Muons and Jets in Proton-antiproton Collisions at 540 and 630 GeV Centre of Mass Energy by :

Download or read book Properties of Muons and Jets in Proton-antiproton Collisions at 540 and 630 GeV Centre of Mass Energy written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Properties of W + Jet Events in Proton-antiproton Collisions at 1.8 TeV

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ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (33 download)

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Book Synopsis Properties of W + Jet Events in Proton-antiproton Collisions at 1.8 TeV by : Robert Brian Drucker

Download or read book Properties of W + Jet Events in Proton-antiproton Collisions at 1.8 TeV written by Robert Brian Drucker and published by . This book was released on 1993 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

New Aspects of High-Energy Proton-Proton Collisions

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Publisher : Springer Science & Business Media
ISBN 13 : 1461595401
Total Pages : 437 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis New Aspects of High-Energy Proton-Proton Collisions by : A. Ali

Download or read book New Aspects of High-Energy Proton-Proton Collisions written by A. Ali and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articles focus on the planned European proton-proton collider, and concentrate on physics issues, rather than the more technical concerns addressed in the three previous workshops. The use of energies much higher than those of the American Superconducting Super Collider is featured. Topics include reviews of current projects, hadron collisions, lep

Fragmentation Properties of Jets Produced in Pp Collisions at [square Root Sign] S

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ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (7 download)

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Book Synopsis Fragmentation Properties of Jets Produced in Pp Collisions at [square Root Sign] S by : Bradley Hubbard

Download or read book Fragmentation Properties of Jets Produced in Pp Collisions at [square Root Sign] S written by Bradley Hubbard and published by . This book was released on 1989 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Detailed Characterization of Jets in Heavy Ion Collisions Using Jet Fragmentation Functions

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ISBN 13 :
Total Pages : 163 pages
Book Rating : 4.:/5 (865 download)

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Book Synopsis Detailed Characterization of Jets in Heavy Ion Collisions Using Jet Fragmentation Functions by : Frank Teng Ma

Download or read book Detailed Characterization of Jets in Heavy Ion Collisions Using Jet Fragmentation Functions written by Frank Teng Ma and published by . This book was released on 2013 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis the jet fragmentation function of inclusive jets with transverse momentum PT > 100 GeV/c in PbPb collisions is measured for reconstructed charged particles with PT > 1 GeV/c within the jet cone. A data sample of PbPb collisions collected in 2011 at a center-of-mass energy of [square root of]sNN = 2.76 TeV corresponding to an integrated luminosity of 150 [mu]b-1 is used. The results for PbPb collisions as a function of collision centrality are compared to reference distributions based on pp data collected at the same collision energy. A centrality-dependent modification of the fragmentation function is revealed. For the most central collisions a significant enhancement is observed in the PbPb/pp fragmentation function ratio for the charged particles with PT less than 3 GeV/c.

Jet Production in the Central Rapidity Region in 1.8 TeV Proton and Antiproton Collisions

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ISBN 13 :
Total Pages : 245 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Jet Production in the Central Rapidity Region in 1.8 TeV Proton and Antiproton Collisions by :

Download or read book Jet Production in the Central Rapidity Region in 1.8 TeV Proton and Antiproton Collisions written by and published by . This book was released on 1989 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we study the jet production cross section in the central rapidity region in {bar p}p collisions at a center of mass energy of 1.8 TeV. The pseudo-rapidity [eta] is defined as [eta] {triple_bond} -ln(tan([theta]/2)), where [theta] is the angle between the directions of the jet momentum and the proton beam. We will call the region -0.7

Search for First-generation Leptoquarks in the Jets and Missing Transverse Energy Topology in Proton-antiproton Collisions at Center-of-mass Energy 1.96 TeV

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (88 download)

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Book Synopsis Search for First-generation Leptoquarks in the Jets and Missing Transverse Energy Topology in Proton-antiproton Collisions at Center-of-mass Energy 1.96 TeV by : Dmitri Tsybychev

Download or read book Search for First-generation Leptoquarks in the Jets and Missing Transverse Energy Topology in Proton-antiproton Collisions at Center-of-mass Energy 1.96 TeV written by Dmitri Tsybychev and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Pair-produced Resonances Decaying to Jet Pairs in Proton{u2013}proton Collisions at $\sqrt{s}$

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ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Search for Pair-produced Resonances Decaying to Jet Pairs in Proton{u2013}proton Collisions at $\sqrt{s}$ by :

Download or read book Search for Pair-produced Resonances Decaying to Jet Pairs in Proton{u2013}proton Collisions at $\sqrt{s}$ written by and published by . This book was released on 2015 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are reported of a general search for pair production of heavy resonances decaying to pairs of hadronic jets in events with at least four jets. The study is based on up to 19.4 fb–1 of integrated luminosity from proton–proton collisions at a center-of-mass energy of 8 TeV, recorded with the CMS detector at the LHC. Limits are determined on the production of scalar top quarks (top squarks) in the framework of R-parity violating supersymmetry and on the production of color-octet vector bosons (colorons). First limits at the LHC are placed on top squark production for two scenarios. The first assumes decay to a bottom quark and a light-flavor quark and is excluded for masses between 200 and 385 GeV, and the second assumes decay to a pair of light-flavor quarks and is excluded for masses between 200 and 350 GeV at 95% confidence level. Furthermore, previous limits on colorons decaying to light-flavor quarks are extended to exclude masses from 200 to 835 GeV.