Related papers: 3pi photo-production with CLAS

Photoproduction of the $f_2(1270)$ meson using the CLAS detector

The quark structure of the $f_2(1270)$ meson has, for many years, been assumed to be a pure quark-antiquark ($q\bar{q}$) resonance with quantum numbers $J^{PC} = 2^{++}$. Recently, it was proposed that the $f_2(1270)$ is a molecular state…

Nuclear Experiment · Physics 2021-03-03 M. ~Carver , A. ~Celentano , K. ~Hicks , L. ~Marsicano , V. ~Mathieu , A. ~Pilloni , K. P. ~Adhikari , S. Adhikari , M. J. ~Amaryan , Giovanni Angelini , H. ~Atac , N. A. ~Baltzell , L. Barion , M. ~Battaglieri , I. ~Bedlinskiy , Fatiha Benmokhtar , A. ~Bianconi , A. S. ~Biselli , M. ~Bondi , F. ~Bossù , S. ~Boiarinov , W. J. ~Briscoe , W. K. ~Brooks , D. ~Bulumulla , V. D. ~Burkert , D. S. ~Carman , J. C. ~Carvajal , P. ~Chatagnon , T. ~Chetry , G. ~Ciullo , L. ~Clark , B. A. ~Clary , P. L. ~Cole , M. ~Contalbrigo , V. ~Crede , A. ~D'Angelo , N. ~Dashyan , R. ~De~Vita , M. Defurne , A. ~Deur , S. Diehl , C. ~Djalali , M. ~Dugger , R. ~Dupre , H. ~Egiyan , M. ~Ehrhart , A. ~El~Alaoui , L. ~El~Fassi , P. ~Eugenio , G. ~Fedotov , S. ~Fegan , A. ~Filippi , G. ~Gavalian , N. ~Gevorgyan , G. P. ~Gilfoyle , F. X. ~Girod , R. W. ~Gothe , K. A. ~Griffioen , K. ~Hafidi , H. ~Hakobyan , M. ~Hattawy , T. B. ~Hayward , D. ~Heddle , M. ~Holtrop , Q. ~Huang , C. E. ~Hyde , Y. ~Ilieva , D. G. ~Ireland , E. L. ~Isupov , D. ~Jenkins , H. S. ~Jo , K. ~Joo , S. ~ Joosten , D. ~Keller , A. ~Khanal , M. ~Khandaker , A. ~Kim , C. W. ~Kim , F. J. ~Klein , A. ~Kripko , V. ~Kubarovsky , L. ~Lanza , M. ~Leali , P. ~Lenisa , K. ~Livingston , I. J. D. ~MacGregor , D. ~Marchand , V. ~Mascagna , M. E. ~McCracken , B. ~McKinnon , Z. E. ~Meziani , V. ~Mokeev , A~Movsisyan , E. ~Munevar , C. ~Munoz~Camacho , P. ~Nadel-Turonski , K. ~Neupane , S. ~Niccolai , G. ~Niculescu , M. ~Osipenko , A. I. ~Ostrovidov , M. ~Paolone , L. L. ~Pappalardo , R. ~Paremuzyan , E. ~Pasyuk , W. ~Phelps , O. ~Pogorelko , Y. ~Prok , D. ~Protopopescu , M. ~Ripani , B. G. ~Ritchie , J. ~Ritman , A. ~Rizzo , G. ~Rosner , J. ~Rowley , F. ~Sabatié , C. ~Salgado , A. ~Schmidt , R. A. ~Schumacher , Y. G. ~Sharabian , U. ~Shrestha , D. ~Sokhan , O. ~Soto , N. ~Sparveris , S. ~Stepanyan , I. I. ~Strakovsky , S. ~Strauch , N. ~Tyler , R. ~Tyson , M. ~Ungaro , L. ~Venturelli , H. ~Voskanyan , E. ~Voutier , D. P. ~Watts , K. ~Wei , X. ~Wei , B. ~Yale , N. ~Zachariou , J. ~Zhang , Z. W. ~Zhao

A search for J^{PC}=1^{-+} exotic mesons in the pi- pi- pi+ and pi- pi0 pi0 systems

A partial wave analysis (PWA) of the pi-pi-pi+ and pi-pi0pi0 systems produced in the reaction pi- p -> (3pi)-p at 18 GeV/c was carried out using an isobar model assumption. This analysis is based on 3.0M pi-pi0pi0 events and 2.6M pi-pi-pi+…

High Energy Physics - Experiment · Physics 2013-05-29 A. R. Dzierba , R. Mitchell , A. P. Szczepaniak , M. Swat , S. Teige

Photoproduction of $\eta$ mesons off the proton for $1.2 < E_\gamma < 4.7$ GeV using CLAS at Jefferson Laboratory

Photoproduction cross sections are reported for the reaction $\gamma p\to p\eta$ using energy-tagged photons and the CLAS spectrometer at Jefferson Laboratory. The $\eta$ mesons are detected in their dominant charged decay mode, $\eta\to…

Nuclear Experiment · Physics 2021-01-04 T. Hu , Z. Akbar , V. Crede , K. P. Adhikari , S. Adhikari , M. J. Amaryan , G. Angelini , G. Asryan , H. Atac , C. Ayerbe Gayoso , L. Barion , M. Battaglieri , I. Bedlinskiy , F. Benmokhtar , A. Bianconi , A. S. Biselli , F. Bossu , S. Boiarinov , W. J. Briscoe , W. K. Brooks , D. S. Carman , J. Carvajal , A. Celentano , P. Chatagnon , T. Chetry , G. Ciullo , L. Clark , B. A. Clary , P. L. Cole , M. Contalbrigo , R. Cruz-Torres , A. D'Angelo , N. Dashyan , R. De Vita , M. Defurne , A. Deur , S. Diehl , C. Djalali , M. Dugger , R. Dupre , H. Egiyan , M. Ehrhart , A. El Alaoui , L. El Fassi , P. Eugenio , G. Fedotov , R. Fersch , A. Filippi , G. Gavalian , G. P. Gilfoyle , F. X. Girod , D. I. Glazier , E. Golovatch , R. W. Gothe , K. A. Griffioen , M. Guidal , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Harrison , M. Hattawy , T. B. Hayward , D. Heddle , K. Hicks , A. Hobart , M. Holtrop , Y. Ilieva , I. Illari , D. G. Ireland , B. S. Ishkhanov , E. L. Isupov , D. Jenkins , H. S. Jo , K. Joo , S. Joosten , D. Keller , M. Khachatryan , A. Khanal , M. Khandaker , A. Kim , C. W. Kim , W. Kim , F. J. Klein , V. Kubarovsky , L. Lanza , M. Leali , P. Lenisa , K. Livingston , I. J. D. MacGregor , D. Marchand , N. Markov , V. Mascagna , M. E. McCracken , B. McKinnon , C. A. Meyer , Z. E. Meziani , T. Mineeva , V. Mokeev , A. Movsisyan , E. Munevar , C. Munoz Camacho , P. Nadel-Turonski , S. Niccolai , G. Niculescu , T. O'Connell , M. Osipenko , A. I. Ostrovidov , M. Paolone , L. L. Pappalardo , R. Paremuzyan , E. Pasyuk , W. Phelps , O. Pogorelko , J. Poudel , J. W. Price , Y. Prok , D. Protopopescu , B. A. Raue , M. Ripani , J. Ritman , A. Rizzo , G. Rosner , J. Rowley , F. Sabatie , C. Salgado , A. Schmidt , R. A. Schumacher , Y. G. Sharabian , U. Shrestha , Iu. Skorodumina , D. Sokhan , O. Soto , N. Sparveris , S. Stepanyan , P. Stoler , I. I. Strakovsky , S. Strauch , J. A. Tan , N. Tyler , M. Ungaro , L. Venturelli , H. Voskanyan , E. Voutier , D. P. Watts , K. Wei , X. Wei , M. H. Wood , N. Zachariou , J. Zhang , Z. W. Zhao

$\pi^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

Differential cross sections for the reaction $\gamma p \to p \pi^0$ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess…

High Energy Physics - Experiment · Physics 2010-04-06 M. Dugger , B. G. Ritchie , J. P. Ball , P. Collins , E. Pasyuk , R. A. Arndt , W. J. Briscoe , I. I. Strakovsky , R. L. Workman , CLAS Collaboration

Nucleon Resonance Electrocouplings from the CLAS Data on Exclusive Meson Electroproduction off Protons

$\gamma_{v}NN^*$ transition helicity amplitudes (electrocouplings) of several prominent excited proton states are determined for the first time in independent analyses of $\pi^+n$, $\pi^0p$, and $\pi^+\pi^-p$ electroproduction off protons.…

Nuclear Experiment · Physics 2011-09-08 Victor I. Mokeev , Inna G. Aznauryan , Volker D. Burkert

K^*0 Photoproduction off the proton at CLAS

We report here differential cross sections for the reaction $\gamma p \to K^{*0}\Sigma^+$ for the first time with high statistics. The measurements were done using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Data were…

Nuclear Experiment · Physics 2017-08-23 I. Hleiqawi , K. Hicks

PWA of 3pi Final States and a Search for the pi1(1600)

Partial wave analyses (PWA) of the 3pi systems in the reactions pi- p --> pi+ pi- pi- p (the ``charged'' mode) and pi- p --> pi- pi0 pi0 p (the ``neutral'' mode) with an 18.3 GeV/c pion beam were performed using high statistics data from…

High Energy Physics - Experiment · Physics 2009-11-11 Ryan E. Mitchell

The pd --> ^3He eta pi0 reaction at T_p = 1450 MeV

The cross section for the pd --> ^3He eta pi0 reaction has been measured at a beam energy of 1450 MeV using the WASA detector at the CELSIUS storage ring and detecting one ^3He and four photons from the decays of the two photons. The data…

Nuclear Experiment · Physics 2010-03-12 K. Schoenning , Chr. Bargholtz , M. Bashkanov , M. Berlowski , D. Bogoslawsky , H. Calen , H. Clement , L. Demiroers , C. Ekstroem , K. Fransson , L. Geren , L. Gustafsson , B. Hoeistad , G. Ivanov , M. Jacewicz , E. Jiganov , T. Johansson , S. Keleta , O. Khakimova , F. Kren , S. Kullander , A. Kupsc , A. Kuzmin , K. Lindberg , P. Marciniewski , B. Morosov , W. Oelert , C. Pauly , H. Petren , Y. Petukhov , A. Povtorejko , W. Scobel , R. Shafigullin , B. Shwartz , T. Skorodko , V. Sopov , J. Stepaniak , P. -E. Tegner , P. Thoerngren-Engblom , V. Tikhomirov , A. Turowiecki , G. J. Wagner , C. Wilkin , M. Wolke , J. Zabierowski , I. Zartova , Jozef Zlomanczuk

Photoproduction of pi0-mesons off protons from the Delta(1232) region to E(gamma) = 3 GeV

Photoproduction of pi0 mesons was studied with the Crystal-Barrel detector at ELSA for incident energies from 300 MeV to 3 GeV. Differential cross sections d sigma /d Omega, d sigma/d t, and the total cross section are presented. For…

Nuclear Experiment · Physics 2019-08-14 H. van Pee , O. Bartholomy , V. Crede

A new measurement of Beam Asymmetry in Pion Photoproduction from the Neutron using CLAS

We present a preliminary analysis of the photon beam asymmetry observable (Sigma) from the photoproduction reaction channel gamma+ n -> p + pi-. This new data was obtained using the near-4pi CEBAF Large Acceptance Spectrometer (CLAS) at…

Nuclear Experiment · Physics 2019-08-13 D. Sokhan , D. Watts , D. Branford , F. Klein

Single photo and electroproduction of pions at EBAC@JLAB

Within the Excited Baryon Analysis Center we have performed a dynamical coupled-channels analysis of the available $p(e,e' \pi)N$ data in the region of $W \leq $ 1.6 GeV and $Q^2 \leq$ 1.45 (GeV/c)$^2$. The channels included are $\gamma^*…

Nuclear Theory · Physics 2015-05-13 B. Julia-Diaz

Measurements of the $\gamma_{v} p \rightarrow p' \pi^{+} \pi^{-}$ cross section with the CLAS detector for $0.4$ GeV$^{2}$ $< Q^{2} <$ $1.0$ GeV$^{2}$ and $1.3$ GeV $< W <$ $1.825$ GeV

New results on the single-differential and fully-integrated cross sections for the process $\gamma_{v} p \rightarrow p' \pi^{+} \pi^{-}$ are presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory.…

Nuclear Experiment · Physics 2018-11-20 G. V. Fedotov , Iu. A. Skorodumina , V. D. Burkert , R. W. Gothe , K. Hicks , V. I. Mokeev , the CLAS Collaboration

Evidence of new nucleon resonances from electromagnetic meson production

The study of nucleon resonances in electromagnetic meson production with the CLAS detector is discussed. The electromagnetic interaction is complementary to pion scattering in the exploration of the nucleon excitation spectrum. Higher mass…

Nuclear Experiment · Physics 2017-08-23 Volker D. Burkert

Measurement of $ep \to e^{'}p\pi^{+}\pi^{-}$: experimental procedures and baryon resonance analysis

The cross section for the reaction $ e p \to e^{\prime} p \pi^{+} \pi^{-}$ was measured in the resonance region for 1.4$<$W$<$2.1 GeV and 0.5$<Q^{2}<$1.5 GeV$^{2}$/c$^{2}$ using the CLAS detector at Jefferson Laboratory. The data show…

High Energy Physics - Experiment · Physics 2007-05-23 M. Ripani , V. D. Burkert , V. Mokeev , M. Battaglieri , R. De Vita , E. Golovach , M. Taiuti

Scalar photoproduction on the proton at CLAS and GlueX energies

In this work we present the results of a theoretical analysis of the data on photoproduction of $f_0(980)$ meson in the laboratory photon energy between $3.0$ GeV and $3.8$ GeV. A comparison is done to the measurements performed by the CLAS…

High Energy Physics - Phenomenology · Physics 2014-04-18 M. L. L. da Silva , M. V. T. Machado

Photoproductions of $f_1(1285)$ and $\eta'(958)$ from the analysis of CLAS data with the Primakoff effect at high energies

We investigate photoproduction of axial vector meson $f_1(1285)$ based on the CLAS experiment $\gamma p\to pf_1(1285)\to p\eta\pi^+\pi^-$ using the Regge model for $\rho^0+\omega$ exchanges. The combined analysis of $\gamma p\to p\eta'\to…

High Energy Physics - Phenomenology · Physics 2020-09-30 Byung-Geel Yu , Kook-Jin Kong

Excited Baryon Structure Using Exclusive Reactions with CLAS12

Studying excited nucleon structure through exclusive electroproduction reactions is an important avenue for exploring the nature of the non-perturbative strong interaction. Electrocouplings for $N^*$ states in the mass range below 1.8~GeV…

Nuclear Experiment · Physics 2016-06-22 Daniel S. Carman

$\phi$-meson photoproduction on Hydrogen in the neutral decay mode

We report the first measurement of the photoproduction cross section of the $\phi$ meson in its neutral decay mode in the reaction $\gamma p \to p\phi(K_SK_L)$. The experiment was performed with a tagged photon beam of energy $1.6 \le…

High Energy Physics - Experiment · Physics 2014-05-28 CLAS Collaboration

Study of Xi Photoproduction from Threshold to W = 3.3 GeV

The doubly-strange Xi baryons provide an effective way to study a puzzle called the missing-baryons problem, where both quark models and lattice gauge theory predict more baryon excited states than are seen experimentally. However, few of…

Nuclear Experiment · Physics 2019-01-02 J. T. Goetz , K. Hicks , M. C. Kunkel , J. W. Price , D. P. Weygand , the CLAS Collaboration

High Energy Behaviour of Light Meson Photoproduction

We evaluated recent CLAS Collaboration measurements for the $90^\circ$ meson photoproduction off the nucleon using a tagged photon beam spanning the energy interval $s = 3 - 11$ GeV$^2$. The results are compared with the "Quark Counting…

High Energy Physics - Phenomenology · Physics 2021-05-26 Moskov J. Amaryan , William J. Briscoe , Michael G. Ryskin , Igor I. Strakovsky