Matt Bellis

Links 'n such

Matt Bellis


Carnegie Mellon University
Department of Physics
5000 Forbes Ave
Pittsburgh, PA 15213
(w) 412-268-6949
(cell) 412-310-4586

bellis@ernest.phys.cmu.edu

  • Current position and education

    • Carnegie Mellon University
      • Post-doctoral research associate with Experimental Medium Energy Physics group
        June 2004 - present
    • Rensselaer Polytechnic Institute
      • Ph.D. in Physics, Dec. 2003
        Thesis topic: A Search For Missing Baryon States.
        Advisor: Jim Napolitano.
      • M.S. in Physics, Dec 2000.
      • B.S. in Physics, May 1992.

  • Research

    • My research currently focuses on mapping out the baryon spectrum. The group at CMU with which I work is involved in a partial wave analysis of many channels in an effort to understand the well established $N^{*}$'s and $\Delta$'s, as well as resolve the missing baryons issue, a problem which has plagued this field for over 30 years.

      We are in the process of analyzing photoproduction data from Jefferson Laboratory in Newport News, VA. The analysis involves a multitude of final states including $p\pi^0, n\pi^+, p\pi^+\pi^-,p\omega, p\eta, p\eta'$, $K^+\Lambda$ and $K^+\Sigma^0$. By combining all these channels, we will be able to extract the amplitudes for any intermediate resonances which contribute to these reactions.

      To this end we have developed a very general analysis package which calculates amplitudes using a covariant tensor formalism. For the first time, we are able to apply theoretical models directly to the data analysis. This package is not specific to our baryon program, but has been written with the idea of applying it to future meson PWA's or Dalitz plot analysis. By enforcing a consistent physics interpretation across a multitude of datasets and final states, we hope to contribute to a clearer picture of the baryon spectrum. We are at the center of the data analysis which is spearheaded by the Excited Baryon Analysis Center, based at Jefferson Laboratory.

    • I am also involved in the Hall-D/GlueX project at Jefferson Lab. This new experimental hall is designed to look for glue-rich hybrid mesons and will be at the forefront of hadronic physics in the years to come. I am deeply involved with the PWA software which will be used in the analysis. I am also currently involved in the general software development for off-line analysis.
    • In my first year of employment at CMU I was stationed at Jefferson Lab where, in addition to my Hall-B commitments, I was the on-site liaison for CMU's commitment to the $G^e_n$ experiment which measures the electric moment of the neutron arm. I was involved with the installation of scintillator bars provided by CMU and used in the neutron detector for the experiment.



  • Talks and presentations

    • APS Topical Group on Hadron Physics
      Oct. 2006, Nashville, TN.
      The CMU Baryon Amplitude Analysis Program.
    • APS Division Of Nuclear Physics
      Oct. 2006, Nashville, TN.
      A PWA of $p \pi^+ \pi^-$ in Photoproduction Using CLAS.
    • CMU Experimental Seminar
      April 2004, Pittsburgh, PA.
      A Partial Wave Decomposition of $\gamma p \rightarrow p \pi^+ \pi^-$
    • Caltech Seminar
      Dec. 2003, Pasadena, CA.
      A Partial Wave Decomposition of $\gamma p \rightarrow p \pi^+ \pi^-$
    • SLAC Experimental Seminar
      Jan. 2004, Menlo Park, CA.
      A Partial Wave Decomposition of $\gamma p \rightarrow p \pi^+ \pi^-$
    • RPI Astrophysics Seminar
      April 2004, Troy, NY.
      Ultra-high Energy Cosmic Rays
    • NSTAR 2004
      March 2004, Grenoble, France.
      A Partial Wave Decomposition of $\gamma p \rightarrow p \pi^+ \pi^-$
    • Conference of Intersections of Particle and Nuclear Physics
      May 2003, New York, NY.
      Analysis of $\gamma p \rightarrow p \pi^+ \pi^-$
    • APS Division Of Nuclear Physics
      Oct. 2002, Lansing, MI.
      Analysis of $\gamma p \rightarrow p \pi^+ \pi^-$, 1.3 < W < 2.3 GeV/c$^{2}$
    • Gordon Research Conference - Photonuclear Reactions
      August 2002, Tilton, NH.
      A Partial Wave Decomposition
      of $\gamma p \rightarrow p \pi^+ \pi^-$ - Poster      .

  • Awards and Societies

    • Rensselaer Founders Award of Excellence, 2002
    • Inducted into $\Sigma \Pi \Sigma$, 2001
    • Walter Eppenstein Teaching Award, 2000
    • Physics Graduate Student Council, 1999-2001
    • Member of APS, 1999-present

  • Teaching Experience

    • Carnegie Mellon University, Pittsburgh, PA. June. 2004 - present
      Mentored undergraduate students for research projects. Drew up instructional material for physics and computing requirements. Developed projects involving analysis of Jefferson Lab data.
    • Rensselaer Polytechnic Institute, Troy, NY. Jan. 2004 - May 2004
      Taught Physics I, Navy Nuclear Program. Full teaching responsibilities: lectures, tests, quizzes, homework assignments.
    • Siena College, Loudonville, NY. August 2002 - Dec 2003
      Taught General Physics IA, August 2003 - December 2003 Full teaching responsibilities: lectures, tests, quizzes, homework assignments.
      Taught General Physics Lab I and II. August 2002 - May. 2003, Provided a lecture before each lab and involved with set up of laboratory materials.
    • Rensselaer Polytechnic Institute, Troy, NY. August 1998 - May 1999
      Teaching assistant for studio Physics I and Physics II and Introduction to Methods of Theoretical Physics. Provided assistance both in and out of the classroom and conducted the occasional lecture.
    • Private tutor, 2000 - 2002
      I was a tutor for AP physics students at Albany Academy High School, as well as for students attending Williams College and SUNY Albany.

  • Other Work Experience

    • DZI, contracted to General Electric, Schenectady , NY. April 1996 - August 1998
      Ran data acquisitions systems during testing on natural gas turbines. Worked on in-house combustion tests and field installations. Installed instrumentation on turbines and maintained database during test period. Worked at sites in California, England and Argentina.

  • Significant Publications

    • The CMU Baryon Amplitude Analysis Program.
      Matt Bellis, et al., Proceeding of the meeting of the Topical Group on Hadronic Physics, October 2006, Nashville TN.
      to appear
    • Search for the $\Theta^+$ pentaquark in the reactions $\gamma p \rightarrow \bar{K}^0K^+n$ and $\gamma p \rightarrow \bar{K}^0K^0p$
      By the CLAS Collaboration (R. DeVita et al.), Phys.Rev.D74:032001
      June 2006, hep-ex/0606062
    • Search for $\Theta^{++}$ pentaquarks in the exclusive reaction $\gamma p \rightarrow K^-K^+p$
      By the CLAS Collaboration (V. Kubarovsky et al.), Phys.Rev.Lett.97:102001
      May 2006, hep-ex/0605001
    • Search for the $\Theta^{+}$(1540) pentaquark in high statistics measurement of $\gamma p \rightarrow \bar{K}^0K^+n$
      By the CLAS Collaboration (M. Battaglieri et al.), Phys.Rev.Lett.96:042001
      Oct 2005, hep-ex/0510061
    • A Partial Wave Decomposition of $\gamma$ p $\rightarrow$ p $\pi^+ \pi^-$
      By the CLAS Collaboration (Matthew Bellis for the collaboration), March 2004, NSTAR 2004 conference proceedings.
    • An Analysis of $\gamma p \rightarrow p \pi^+ \pi^-$ Using the CLAS Detector.
      By the CLAS Collaboration (Matthew Bellis for the collaboration), Sept. 2003, AIP Conf. Proc., Vol. 698, hep-ex/0309040

  • Publications

    • Measurement of the N --$>$ Delta+(1232) transition at high momentum transfer by pi0 electroproduction.
      By the CLAS Collaboration (M. Ungaroet al.),Phys.Rev.Lett.97:112003
      Jun. 2006, hep-ex/0606042
    • Measurement of deeply virtual compton scattering with a polarized proton target.
      By the CLAS Collaboration (S. Chenet al.),Phys.Rev.Lett.97:072002
      Jun. 2006, hep-ex/0605012
    • Eta-prime photoproduction on the proton for photon energies from 1.527-GeV to 2.227-GeV.
      By the CLAS Collaboration (M. Duggeret al.),Phys.Rev.Lett.96:062001
      Dec. 2006, nucl-ex/0512019
    • Differential cross sections for gamma + p --$>$ K+ + Y for Lambda and Sigma0 hyperons.
      By the CLAS Collaboration (R. Bradfordet al.),Phys.Rev.C73:035202
      Sept. 2005, nucl-ex/0509033
    • Radiative decays of the Sigma0(1385) and Lambda(1520) hyperons.
      By the CLAS Collaboration (S, Tayloret al.),Phys.Rev.C71:055609
      Mar. 2005, hep-ex/0503014
    • Exclusive photoproduction of the Cascade (Xi) hyperons
      By the CLAS Collaboration (J.W. Priceet al.),
      Sept. 2004, nucl-ex/0409030
    • Exclusive $\rho^{0}$ meson electroproduction from hydrogen at CLAS
      By the CLAS Collaboration (C. Hadjidakis et al.),
      Aug 2004, hep-ex/0408005
    • Survey of A(LT') asymmetries in semi-exclusive electron scattering on He-4 and C-12
      By the CLAS Collaboration (D. Protopopescu et al.),
      May 2004, nucl-ex/0405021
    • Complete angular distribution measurements of two-body deuteron photodisintegration between 0.5-GeV and 3-GeV
      By the CLAS Collaboration (M. Mirazita et al.), Phys Rev C70:014005
      May 2004, nucl-ex/0405019
    • Onset of asymptotic scaling in deuteron photodisintegration
      By the CLAS Collaboration (P. Rossi et al.),
      May 2004, hep-ph/0405207
    • Proton source size measurements in the e A -$>$ e' p p X reaction
      By the CLAS Collaboration (A.V. Stavinsky et al.), Phys.Rev.Lett.93:192301
      May 2004, hep-ex/0405064
    • Tensor polarization of the Phi meson photoproduced at high t
      By the CLAS Collaboration (K. McCormick et al.),Phys.Rev.C69:032203
      Nov 2003, hep-ex/0311024
    • Observation of an Exotic S=+1 Baryon in Exclusive Photoproduction from Deuteron.
      By the CLAS Collaboration (S. Stepanyan et al.),
      Jul 2003, hep-ex/0307018
    • Measurement of the Proton Spin Structure Function $G(1)(X,Q^2) for Q^2$ from 0.15 to 1.6 $GeV^2$ With CLAS.
      By the CLAS Collaboration (R. Fatemi et al.),
      Jun 2003, nucl-ex/0306019
    • Hyperon Photoproduction in the Nucleon Resonance Region.
      By the CLAS Collaboration (J.W.C. McNabb et al.),
      May 2003, nucl-ex/0305028
    • Measurement of the Polarized Structure Function $\sigma_{LT}$ for $p(\vec{e},e'p)\pi^0$ in th $\Delta(1232)$ Resonance Region.
      By the CLAS Collaboration (K. Joo et al.), Phys. Rev C 68:032201
      Jan 2003, nucl-ex/0301012
    • Observation of Nuclear Scaling in the $A(e,e')$ Reaction at $x_B > 1$
      By the CLAS Collaboration (K. Joo et al.), Phys. Rev C 68:032201
      Jan 2003, nucl-ex/0301012
    • Observation of Nuclear Scaling in the $A(e,e')$ Reaction at $x_B > 1$
      By the CLAS Collaboration (K.S. Egiyan et al.), Phys. Rev C 68:014313
      Jan 2003, nucl-ex/0301008
    • Measurement of Beam Spin Asymmetries for Deep Inelastic $\pi^+$ Electroproduction.
      By the CLAS Collaboration (H. Avakian et al.),
      Jan 2003, hep-ex/0301005
    • First Measurement of Transferred Polarization in the Exclusive $\vec{e}p\rightarrow e' K^+ \vec{\Lambda}$ Reaction.
      By the CLAS Collaboration (D.S. Carman et al.), Phys.Rev.Lett, 90:131804,
      Dec 2002, hep-ex/0212014
    • $\eta$ Photoproduction on the Proton for Photon Energies from 0.75 to 1.95 GeV.
      By the CLAS Collaboration (M. Dugger et al.), Phys.Rev.Lett, 89:222002,
      2002