First measurement of Ξ− polarization in photoproduction

First measurement of Ξ− polarization in photoproduction
复制标题

DOI：
10.1016/j.physletb.2018.07.004
复制
发表时间：
2018-04
期刊：
Physics Letters B
影响因子：
4.4
通讯作者：
J. Bono;L. Guo;B. Raue;S. Adhikari;M. Kunkel;K. Adhikari;Z. Akbar;M. Amaryan;J. Ball;L. Barion;M. Bashkanov;M. Battaglieri;V. Batourine;I. Bedlinskiy;A. Biselli;W. Brooks;V. Burkert;F. Cao;D. Carman;A. Celentano;G. Charles;T. Chetry;G. Ciullo;B. Clary;P. Cole;M. Contalbrigo;V. Crede;A. D’angelo;N. Dashyan;R. De Vita;M. Defurne;A. Deur;S. Diehl;C. Djalali;M. Dugger;H. Egiyan;A. El Alaoui;L. El Fassi;P. Eugenio;G. Fedotov;A. Filippi;A. Fradi;G. Gavalian;N. Gevorgyan;Y. Ghandilyan;F. Girod;D. Glazier;W. Gohn;E. Golovatch;R. Gothe;K. Griffioen;K. Hafidi;N. Harrison;M. Hattawy;D. Heddle;K. Hicks;P. H. Hopchev;Y. Ilieva;D. Ireland;E. Isupov;H. Jo;S. Johnston;M. Kabir;D. Keller;G. Khachatryan;M. Khachatryan;M. Khandaker;A. Kim;W. Kim;A. Klein;F. Klein;V. Kubarovsky;P. Lenisa;K. Livingston;I. MacGregor;N. Markov;B. Mckinnon;T. Mineeva;R. Montgomery;C. Muñoz Camacho;G. Niculescu;M. Osipenko;A. Ostrovidov;M. Paolone;R. Paremuzyan;K. Park;E. Pasyuk;W. Phelps;O. Pogorelko;J. Price;Y. Prok;D. Protopopescu;M. Ripani;Alessandro Rizzo;G. Rosner;F. Sabatié;C. Salgado;R. Schumacher;Y. Sharabian;I. Skorodumina;G.D. Smith;D. Sokhan;N. Sparveris;S. Stepanyan;I. Strakovsky;S. Strauch;M. Taiuti;J.A. Tan;M. Ungaro;H. Voskanyan;E. Voutier;R. Wang;X. Wei;M. Wood;N. Zachariou;L. Zana;J. Zhang;Z. Zhao
J. Bono;L. Guo;B. Raue;S. Adhikari;M. Kunkel;K. Adhikari;Z. Akbar;M. Amaryan;J. Ball;L. Barion;M. Bashkanov;M. Battaglieri;V. Batourine;I. Bedlinskiy;A. Biselli;W. Brooks;V. Burkert;F. Cao;D. Carman;A. Celentano;G. Charles;T. Chetry;G. Ciullo;B. Clary;P. Cole;M. Contalbrigo;V. Crede;A. D’angelo;N. Dashyan;R. De Vita;M. Defurne;A. Deur;S. Diehl;C. Djalali;M. Dugger;H. Egiyan;A. El Alaoui;L. El Fassi;P. Eugenio;G. Fedotov;A. Filippi;A. Fradi;G. Gavalian;N. Gevorgyan;Y. Ghandilyan;F. Girod;D. Glazier;W. Gohn;E. Golovatch;R. Gothe;K. Griffioen;K. Hafidi;N. Harrison;M. Hattawy;D. Heddle;K. Hicks;P. H. Hopchev;Y. Ilieva;D. Ireland;E. Isupov;H. Jo;S. Johnston;M. Kabir;D. Keller;G. Khachatryan;M. Khachatryan;M. Khandaker;A. Kim;W. Kim;A. Klein;F. Klein;V. Kubarovsky;P. Lenisa;K. Livingston;I. MacGregor;N. Markov;B. Mckinnon;T. Mineeva;R. Montgomery;C. Muñoz Camacho;G. Niculescu;M. Osipenko;A. Ostrovidov;M. Paolone;R. Paremuzyan;K. Park;E. Pasyuk;W. Phelps;O. Pogorelko;J. Price;Y. Prok;D. Protopopescu;M. Ripani;Alessandro Rizzo;G. Rosner;F. Sabatié;C. Salgado;R. Schumacher;Y. Sharabian;I. Skorodumina;G.D. Smith;D. Sokhan;N. Sparveris;S. Stepanyan;I. Strakovsky;S. Strauch;M. Taiuti;J.A. Tan;M. Ungaro;H. Voskanyan;E. Voutier;R. Wang;X. Wei;M. Wood;N. Zachariou;L. Zana;J. Zhang;Z. Zhao
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
J. Bono;L. Guo;B. Raue;S. Adhikari;M. Kunkel;K. Adhikari;Z. Akbar;M. Amaryan;J. Ball;L. Barion;M. Bashkanov;M. Battaglieri;V. Batourine;I. Bedlinskiy;A. Biselli;W. Brooks;V. Burkert;F. Cao;D. Carman;A. Celentano;G. Charles;T. Chetry;G. Ciullo;B. Clary;P. Cole;M. Contalbrigo;V. Crede;A. D’angelo;N. Dashyan;R. De Vita;M. Defurne;A. Deur;S. Diehl;C. Djalali;M. Dugger;H. Egiyan;A. El Alaoui;L. El Fassi;P. Eugenio;G. Fedotov;A. Filippi;A. Fradi;G. Gavalian;N. Gevorgyan;Y. Ghandilyan;F. Girod;D. Glazier;W. Gohn;E. Golovatch;R. Gothe;K. Griffioen;K. Hafidi;N. Harrison;M. Hattawy;D. Heddle;K. Hicks;P. H. Hopchev;Y. Ilieva;D. Ireland;E. Isupov;H. Jo;S. Johnston;M. Kabir;D. Keller;G. Khachatryan;M. Khachatryan;M. Khandaker;A. Kim;W. Kim;A. Klein;F. Klein;V. Kubarovsky;P. Lenisa;K. Livingston;I. MacGregor;N. Markov;B. Mckinnon;T. Mineeva;R. Montgomery;C. Muñoz Camacho;G. Niculescu;M. Osipenko;A. Ostrovidov;M. Paolone;R. Paremuzyan;K. Park;E. Pasyuk;W. Phelps;O. Pogorelko;J. Price;Y. Prok;D. Protopopescu;M. Ripani;Alessandro Rizzo;G. Rosner;F. Sabatié;C. Salgado;R. Schumacher;Y. Sharabian;I. Skorodumina;G.D. Smith;D. Sokhan;N. Sparveris;S. Stepanyan;I. Strakovsky;S. Strauch;M. Taiuti;J.A. Tan;M. Ungaro;H. Voskanyan;E. Voutier;R. Wang;X. Wei;M. Wood;N. Zachariou;L. Zana;J. Zhang;Z. Zhao

文献摘要

被引文献

相似文献

尽管对超子光生的研究已经进行了几十年，但它们的产生机制和激发态光谱仍然是未知的。虽然宇称破缺弱衰变的超子提供了一种测量其极化的方法，这可以帮助辨别它们的产生机制和确定它们的激发光谱，但由于低的产生截面，没有这样的研究可能用于光生双奇异重子。然而，通过利用反应γ p→ K+ K+ π −，我们第一次测量了从圆偏振真实的光子（用Cx和Cz表征）到反冲π − s的激发极化P和转移极化。这些数据是使用杰斐逊实验室的CEBAF大型接受光谱仪（CLAS）获得的，光子能量从刚刚超过阈值（2.4 GeV）到5.45 GeV。这些第一次的测量进行比较，并显示出广泛同意，与模型预测级联光生通过衰变的中间超子共振，通过相对论介子交换产生的收益，提供了一个新的一步，在理解的生产和极化的双奇异重子。
Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-violating weak decay of hyperons offers a means of measuring their polarization, which could help discern their production mechanisms and identify their excitation spectra, no such study has been possible for doubly strange baryons in photoproduction, due to low production cross sections. However, by making use of the reaction γ p→ K+ K+ Ξ−, we have measured, for the first time, the induced polarization, P, and the transferred polarization from circularly polarized real photons, characterized by C x and C z, to recoiling Ξ− s. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab for photon energies from just over threshold (2.4 GeV) to 5.45 GeV. These first-time measurements are compared, and are shown to broadly agree, with model predictions in which cascade photoproduction proceeds through the decay of intermediate hyperon resonances that are produced via relativistic meson exchange, offering a new step forward in the understanding of the production and polarization of doubly-strange baryons.