Related papers: Data analysis techniques, differential cross secti…

Properties of the Lambda(1405) Measured at CLAS

Using the CLAS detector system in Hall B at Jefferson Lab, we have done a high statistics measurement of the photoproduction of K+ Lambda(1405) using a proton target. The reconstructed invariant mass seen in the various Sigma pi decay modes…

Nuclear Experiment · Physics 2014-11-20 Kei Moriya , Reinhard Schumacher

An Analysis Of $\gamma p \to p \pi^+ \pi^-$ Using The CLAS Detector

Two charged pion final states are studied for GeV photons incident on protons. The data come from Thomas Jefferson National Accelerator Facility using the CLAS detector. A tagged photon beam of 0.5-2.4 GeV/c was produced through…

High Energy Physics - Experiment · Physics 2019-08-14 Matt Bellis

Measurement of the reaction $\gamma p \TO K^ + \Lambda(1520)$ at photon energies up to 2.65 GeV

The reaction $\gamma p \TO K^+\Lambda(1520)$ was measured in the energy range from threshold to 2.65 GeV with the SAPHIR detector at the electron stretcher facility ELSA in Bonn. The $\Lambda(1520)$ production cross section was analyzed in…

Nuclear Experiment · Physics 2015-05-20 F. W. Wieland , J. Barth , K. -H. Glander , J. Hannappel , N. Jöpen , F. Klein , E. Klempt , R. Lawall , D. Menze , M. Ostrick , E. Paul , I. Schulday , W. J. Schwille

Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)

The reaction gamma + p -> K+ + Sigma + pi was used to determine the invariant mass distributions or "line shapes" of the Sigma+ pi-, Sigma- pi+ and Sigma0 pi0 final states, from threshold at 1328 MeV/c^2 through the mass range of the…

Nuclear Experiment · Physics 2013-03-27 Kei Moriya , Reinhard Schumacher

Properties of the Lambda(1405) Measured at CLAS

The nature of the Lambda(1405), and its place in the baryon spectrum has remained uncertain for decades. Theoretical studies have shown that it may possess strong dynamical components which are not seen in other well-known baryons. Using…

Nuclear Experiment · Physics 2019-08-13 Kei Moriya , Reinhard Schumacher

Photoproduction of {\omega} Mesons off the Proton

The differential cross sections and unpolarized spin-density matrix elements for the reaction $\gamma p\to p\omega$ were measured using the CBELSA/TAPS experiment for initial photon energies ranging from the reaction threshold to 2.5 GeV.…

Nuclear Experiment · Physics 2019-08-14 A. Wilson , V. Crede , A. V. Anisovich , J. C. S. Bacelar , B. Bantes , O. Bartholomy , D. Bayadilov , R. Beck , Y. A. Beloglazov , K. T. Brinkmann , R. Castelijns , H. Dutz , D. Elsner , R. Ewald , F. Frommberger , M. Fuchs , Chr. Funke , R. Gregor , A. Gridnev , E. Gutz , J. Hannappel , W. Hillert , P. Hoffmeister , I. Horn , I. Jaegle , T. Jude , J. Junkersfeld , H. Kalinowsky , V. Kleber , Frank Klein , Friedrich Klein , E. Klempt , M. Kotulla , B. Krusche , M. Lang , H. Löhner , I. V. Lopatin , S. Lugert , T. Mertens , J. G. Messchendorp , V. Metag , M. Nanova , V. A. Nikonov , D. Novinski , R. Novotny , M. Ostrick , L. M. Pant , H. van Pee , M. Pfeiffer , A. Roy , A. V. Sarantsev , C. Schmidt , H. Schmieden , S. Shende , V. Sokhoyan , N. Sparks , A. Süle , V. V. Sumachev , T. Szczepanek , U. Thoma , D. Trnka , R. Varma , D. Walther , Ch. Wendel , U. Wiedner

Measurements of the parameters of the $\phi(1020)$ resonance through studies of the processes $e^+e^- \to K^+K^-$, $K_SK_L$ and $\pi^+\pi^-\pi^0$

The cross sections of the processes $e^+e^- \to K^+K^-$, $e^+e^- \to K_SK_L$ and $e^+e^- \to \pi^+\pi^-\pi^0$ were measured in the SND experiment at the VEPP-2M collider in the energy region near the $\phi(1020)$ meson. These measurements…

High Energy Physics - Experiment · Physics 2019-08-17 M. N. Achasov , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , A. V. Bozhenok , A. D. Bukin , D. A. Bukin , S. V. Burdin , T. V. Dimova , V. P. Druzhinin , M. S. Dubrovin , I. A. Gaponenko , V. B. Golubev , V. N. Ivanchenko , P. M. Ivanov , A. A. Korol , M. S. Korostelev , S. V. Koshuba , E. V. Pakhtusova , A. A. Polunin , E. E. Pyata , A. A. Salnikov , S. I. Serednyakov , V. V. Shary , Yu. M. Shatunov , V. A. Sidorov , Z. K. Silagadze , A. N. Skrinsky , Yu. V. Usov , A. V. Vasiljev , Yu. S. Velikzhanin

Branching Ratio of the Electromagnetic Decay of the $\Sigma^{+}(1385)$

The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the $\Sigma^{*+}(1385)$ from the reaction $\gamma p \to K^0 \Sigma^{*+}(1385)$. A real photon beam with a maximum energy of 3.8 GeV was incident…

Nuclear Experiment · Physics 2015-06-03 D. Keller , K. Hicks , CLAS Collaboration

Nucleon and $\Delta$ resonances in $\gamma p \to K^+ \Sigma^0(1385)$ photoproduction

The photoproduction of $\gamma p \to K^+ \Sigma^0(1385)$ is investigated based on an effective Lagrangian approach using the tree-level Born approximation, with the purpose of understanding the reaction mechanisms and resonance contents and…

High Energy Physics - Phenomenology · Physics 2020-04-22 Ai-Chao Wang , Wen-Ling Wang , Fei Huang

Leptonic and charged kaon decay modes of the $\phi$ meson measured in heavy-ion collisions at the CERN SPS

We report a measurement of $\phi$ meson production in central Pb+Au collisions at E$_{lab}$/A=158 GeV. For the first time in heavy-ion collisions, $\phi$ mesons were reconstructed in the same experiment both in the K$^+$K$^-$ and the…

Nuclear Experiment · Physics 2011-08-17 D. Adamova , CERES Collaboration

Non-diffractive mechanisms in the $\phi$ meson photoproduction on nucleons

We examine the non-diffractive mechanisms in the $\phi$ meson photoproduction from threshold up to a few GeV using an effective Lagrangian in a constituent quark model. The new data from CLAS at large angles can be consistently accounted…

Nuclear Theory · Physics 2009-11-07 Qiang Zhao , B. Saghai , J. S. Al-Khalili

Wide acceptance measurement of the K$^-$/K$^+$ ratio from Ni+Ni collisions at 1.91A GeV

The FOPI Collaboration at the GSI SIS-18 synchrotron measured charged kaons from central and semi-central collisions of Ni+Ni at a beam energy of 1.91A GeV. We present the distribution of the K$^-$\K$^+$ ratio on the energy vs polar angle…

Nuclear Experiment · Physics 2019-01-23 K. Piasecki , N. Herrmann , R. Averbeck , A. Andronic , V. Barret , Z. Basrak , N. Bastid , M. L. Benabderrahmane , M. Berger , P. Buehler , M. Cargnelli , R. Čaplar , E. Cordier , P. Crochet , O. Czerwiakowa , I. Deppner , P. Dupieux , M. Dželalija , L. Fabbietti , Z. Fodor , P. Gasik , I. Gašparić , Y. Grishkin , O. N. Hartmann , K. D. Hildenbrand , B. Hong , T. I. Kang , J. Kecskemeti , Y. J. Kim , M. Kirejczyk , M. Kiš , P. Koczon , M. Korolija , R. Kotte , A. Lebedev , Y. Leifels , A. Le Fèvre , J. L. Liu , X. Lopez , A. Mangiarotti , V. Manko , J. Marton , T. Matulewicz , M. Merschmeyer , R. Münzer , D. Pelte , M. Petrovici , F. Rami , A. Reischl , W. Reisdorf , M. S. Ryu , P. Schmidt , A. Schüttauf , Z. Seres , B. Sikora , K. S. Sim , V. Simion , K. Siwek-Wilczyńska , V. Smolyankin , G. Stoicea , K. Suzuki , Z. Tymiński , P. Wagner , I. Weber , E. Widmann , K. Wiśniewski , Z. G. Xiao , H. S. Xu , I. Yushmanov , Y. Zhang , A. Zhilin , V. Zinyuk , J. Zmeskal

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

Measurement of single- and double-polarization observables in the photoproduction of $\pi^+\pi^-$~meson pairs off the proton using CLAS at Jefferson Laboratory

The photoproduction of $\pi^+\pi^-$ meson pairs off the proton has been studied in the reaction $\gamma p\to p\,\pi^+\pi^-$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (FROST) in Hall B at the Thomas…

Nuclear Experiment · Physics 2025-05-01 P. Roy , S. Cao , V. Crede , E. Klempt , V. A. Nikonov , A. V. Sarantsev , V. D. Burkert , V. Mokeev , P. Achenbach , J. S. Alvarado , W. R. Armstrong , H. Atac , H. Avakian , N. A. Baltzell , L. Barion , M. Bashkanov , M. Battaglieri , F. Benmokhtar , A. Bianconi , A. S. Biselli , M. Bondi , F. Bossu , S. Boiarinov , K. -T. Brinkmann , W. J. Briscoe , W. K. Brooks , T. Cao , R. Capobianco , D. S. Carman , P. Chatagnon , G. Ciullo , P. L. Cole , M. Contalbrigo , A. D'Angelo , N. Dashyan , R. DeVita , M. Defurne , A. Deur , S. Diehl , C. Djalali , M. Dugger , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , P. Eugenio , S. Fegan , I. P. Fernando , A. Filippi , G. Gavalian , R. W. Gothe , L. Guo , K. Hafidi , H. Hakobyan , M. Hattawy , T. B. Hayward , D. Heddle , A. Hobart , M. Holtrop , Y. Ilieva , D. G. Ireland , E. L. Isupov , D. Jenkins , H. Jiang , H. S. Jo , K. Joo , S. Joosten , D. Keller , M. Khandaker , A. Kim , W. Kim , F. J. Klein , V. Klimenko , A. Kripko , V. Kubarovsky , L. Lanza , P. Lenisa , X. Li , K. Livingston , I. J. D. MacGregor , D. Marchand , D. Martiryan , V. Mascagna , D. Matamoros , M. E. McCracken , B. McKinnon , T. Mineeva , C. Munoz Camacho , P. Nadel-Turonski , K. Neupane , D. Nguyen , G. Niculescu , M. Osipenko , A. I. Ostrovidov , M. Ouillon , P. Pandey , M. Paolone , L. L. Pappalardo , R. Paremuzyan , E. Pasyuk , S. J. Paul , W. Phelps , N. Pilleux , S. Polcher Rafael , J. Price , Y. Prok , D. Protopopescu , J. Richards , M. Ripani , B. Ritchie , J. Ritman , G. Rosner , P. Rossi , A. A. Rusova , C. Salgado , S. Schadmand , A. Schmidt , R. A. Schumacher , Y. G. Sharabian , E. V. Shirokov , S. Shrestha , D. Sokhan , N. Sparveris , M. Spreafico , I. I. Strakovsky , S. Strauch , J. A. Tan , M. Tenorio , N. Trotta , R. Tyson , M. Ungaro , S. Vallarino , L. Venturelli , T. Vittorini , H. Voskanyan , E. Voutier , D. P. Watts , U. Weerasinghe , X. Wei , M. H. Wood , L. Xu , N. Zachariou , Z. W. Zhao , M. Zurek

Energy dependence of $\phi$ meson production at forward rapidity in pp collisions at the LHC

The production of $\phi$ mesons has been studied in pp collisions at LHC energies with the ALICE detector via the dimuon decay channel in the rapidity region $2.5 < y < 4$. Measurements of the differential cross section ${\rm…

Nuclear Experiment · Physics 2022-04-07 ALICE Collaboration

Photoproduction of $K^{*+}\Lambda$ and $K^+\Sigma(1385)$ in the reaction $\gamma \lowercase{p} \to K^+ \Lambda \pi^0 $ at Jefferson Lab

The search for missing nucleon resonances using coupled channel analysis has mostly been concentrated on $N\pi$ and $KY$ channels, while the contributions of $K^*Y$ and $KY^*$ channels have not been investigated thoroughly mostly due to the…

High Energy Physics - Experiment · Physics 2019-08-14 L. Guo , D. P. Weygand

Measurement of the $e^+e^-\to K_SK_L$ cross section near the $\phi(1020)$ resonance with the SND detector

The cross section for the $e^+e^-\to K_SK_L$ process is measured in the center-of-mass energy range from 1000 MeV to 1100 MeV in the experiment with the SND detector at the VEPP-2000 $e^+e^-$ collider. The measurement is carried out in the…

High Energy Physics - Experiment · Physics 2024-09-13 SND Collaboration , M. N. Achasov , A. Yu. Barnyakov , E. V. Bedarev , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , A. A. Botov , D. E. Chistyakov , T. V. Dimova , V. P. Druzhinin , E. V. Kardapoltsev , A. S. Kasaev , A. A. Kattsin , A. G. Kharlamov , I. A. Koop , A. A. Korol , D. P. Kovrizhin , A. S. Kupich , A. P. Kryukov , N. A. Melnikova , N. Yu. Muchnoi , A. E. Obrazovsky , E. V. Pakhtusova , K. V. Pugachev , S. A. Rastigeev , Yu. A. Rogovsky , A. I. Senchenko , S. I. Serednyakov , Yu. M. Shatunov , S. P. Sherstyuk , D. A. Shtol , Z. K. Silagadze , I. K. Surin , Yu. V. Usov , V. N. Zhabin , Yu. M. Zharinov

Near-threshold Photoproduction of Phi Mesons from Deuterium

We report the first measurement of the differential cross section on $\phi$-meson photoproduction from deuterium near the production threshold for a proton using the CLAS detector and a tagged-photon beam in Hall B at Jefferson Lab. The…

Nuclear Experiment · Physics 2011-02-03 X. Qian , W. Chen , H. Gao , K. Hicks , K. Kramer , J. M. Laget , T. Mibe , Y. Qiang , S. Stepanyan , D. J. Tedeschi , W. Xu , K. P. Adhikari , M. Amaryan , M. Anghinolfi , J. Ball , M. Battaglieri , V. Batourine , I. Bedlinskiy , M. Bellis , A. S. Biselli , C. Bookwalter , D. Branford , W. J. Briscoe , W. K. Brooks , V. D. Burkert , S. L. Careccia , D. S. Carman , P. L. Cole , P. Collins , V. Crede , A. D'Angelo , A. Daniel , N. Dashyan , R. De Vita , E. De Sanctis , A. Deur , B. Dey , S. Dhamija , C. Djalali , D. Doughty , R. Dupre , H. Egiyan , A. El Alaoui , P. Eugenio , S. Fegan , M. Y. Gabrielyan , N. Gevorgyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , J. T. Goetz , W. Gohn , R. W. Gothe , L. Graham , K. A. Griffioen , M. Guidal , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Hassall , M. Holtrop , Y. Ilieva , D. G. Ireland , S. S. Jawalkar , H. S. Jo , K. Joo , D. Keller , M. Khandaker , P. Khetarpal , A. Kim , W. Kim , A. Klein , F. J. Klein , P. Konczykowski , V. Kubarovsky , S. V. Kuleshov , V. Kuznetsov , K. Livingston , D. Martinez , M. Mayer , J. McAndrew , M. E. McCracken , B. McKinnon , C. A. Meyer , K. Mikhailov , T. Mineeva , M. Mirazita , V. Mokeev , B. Moreno , K. Moriya , B. Morrison , H. Moutarde , E. Munevar , P. Nadel-Turonski , A. Ni , S. Niccolai , I. Niculescu , M. R. Niroula , M. Osipenko , A. I. Ostrovidov , R. Paremuzyan , K. Park , S. Park , S. Anefalos Pereira , S. Pisano , O. Pogorelko , S. Pozdniakov , J. W. Price , S. Procureur , D. Protopopescu , G. Ricco , M. Ripani , B. G. Ritchie , G. Rosner , P. Rossi , F. Sabatié , M. S. Saini , C. Salgado , D. Schott , R. A. Schumacher , E. Seder , H. Seraydaryan , Y. G. Sharabian , E. S. Smith , G. D. Smith , D. I. Sober , D. Sokhan , S. S. Stepanyan , P. Stoler , I. I. Strakovsky , S. Strauch , M. Taiuti , C. E. Taylor , S. Tkachenko , M. Ungaro , B . Vernarsky , M. F. Vineyard , E. Voutier , L. B. Weinstein , D. P. Weygand , M. H. Wood , N. Zachariou , L. Zana , J. Zhang , B. Zhao , Z. W. Zhao

Charged K* Photoproduction in a Regge model

We investigate $\gamma p \to K^{*+} \Lambda$ reaction within a Regge approach. For the gauge invariance of the scattering amplitude, we reggeize the s-channel and contact term amplitudes as well as the $t$-channel amplitude. We obtain the…

High Energy Physics - Phenomenology · Physics 2014-11-20 S. Ozaki , H. Nagahiro , A. Hosaka

Kaon Pair Production in Proton--Proton Collisions

The differential and total cross sections for kaon pair production in the pp->ppK+K- reaction have been measured at three beam energies of 2.65, 2.70, and 2.83 GeV using the ANKE magnetic spectrometer at the COSY-Juelich accelerator. These…

Nuclear Experiment · Physics 2008-11-26 Y. Maeda , M. Hartmann , I. Keshelashvili , S. Barsov , M. Büscher , M. Drochner , A. Dzyuba , V. Hejny , A. Kacharava , V. Kleber , H. R. Koch , V. Koptev , P. Kulessa , B. Lorentz , T. Mersmann , S. Mikirtytchiants , A. Mussgiller , M. Nekipelov , H. Ohm , D. Prasuhn , R. Schleichert , H. J. Stein , H. Ströher , Yu. Valdau , C. Wilkin , P. Wüstner