New analysis of the low-energy π±p differential cross-sections of the CHAOS Collaboration

被引：2

作者：

Matsinos, E. ^{[1
]}

Rasche, G. ^{[2
]}

机构：

[1] Zurich Univ Appl Sci, Inst Mechatron Syst, CH-8401 Winterthur, Switzerland

[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2015年 / 24卷 / 07期

关键词：

pi N elastic scattering; pi N Sigma term; SCATTERING; MODEL;

D O I：

10.1142/S0218301315500500

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In a previous paper, we reported the results of a partial-wave analysis (PWA) of the pion-nucleon (pi N) differential cross-sections (DCSs) of the CHAOS Collaboration and came to the conclusion that the angular distribution of their pi(+)p data sets is incompatible with the rest of the modern (meson factory) database. The present work, re-addressing this issue, has been instigated by a number of recent improvements in our analysis, namely regarding the inclusion of the theoretical uncertainties when investigating the reproduction of experimental data sets on the basis of a given "theoretical" solution, modifications in the parametrization of the form factors of the proton and of the pion entering the electromagnetic part of the pi N amplitude, and the inclusion of the effects of the variation of the sigma-meson mass when fitting the ETH model of the pi N interaction to the experimental data. The new analysis of the CHAOS DCSs confirms our earlier conclusions and casts doubt on the value for the pi N Sigma term, which Stahov, Clement and Wagner have extracted from these data.

引用

页数：15

共 25 条

[1]

Abramowitz M., 1969, Handbook of mathematical functions: with formulas, graphs and mathematical tables

[2] Improved description of the πN-scattering phenomenology at low energies in covariant baryon chiral perturbation theory [J].

Alarcon, J. M. ;

Camalich, J. Martin ;

Oller, J. A. .

ANNALS OF PHYSICS, 2013, 336 :413-461

[3] A MEASUREMENT OF THE SPACE-LIKE PION ELECTROMAGNETIC FORM-FACTOR [J].

AMENDOLIA, SR ;

ARIK, M ;

BADELEK, B ;

BATIGNANI, G ;

BECK, GA ;

BEDESCHI, F ;

BELLAMY, EH ;

BERTOLUCCI, E ;

BETTONI, D ;

BILOKON, H ;

BOLOGNA, G ;

BOSISIO, L ;

BRADASCHIA, C ;

BUDINICH, M ;

CODINO, A ;

DELLORSO, M ;

PIAZZOLI, BD ;

ENORINI, M ;

FABBRI, FL ;

FIDECARO, F ;

FOA, L ;

FOCARDI, E ;

FRANK, SGF ;

GIAZOTTO, A ;

GIORGI, MA ;

GREEN, MG ;

HARVEY, J ;

HEATH, GP ;

LANDON, MPJ ;

LAURELLI, P ;

LIELLO, F ;

MANNOCCHI, G ;

MARCH, PV ;

MARROCCHESI, PS ;

MENZIONE, A ;

MERONI, E ;

MORONI, L ;

MILOTTI, E ;

PICCHI, P ;

RAGUSA, F ;

RISTORI, L ;

ROLANDI, L ;

SALA, S ;

SALTMARSH, CG ;

SAOUCHA, A ;

SATTA, L ;

SCRIBANO, A ;

SPILLANTINI, P ;

STEFANINI, A ;

STOREY, D .

NUCLEAR PHYSICS B, 1986, 277 (01) :168-196

[4] Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen [J].

Antognini, Aldo ;

Nez, Francois ;

Schuhmann, Karsten ;

Amaro, Fernando D. ;

Biraben, Francois ;

Cardoso, Joao M. R. ;

Covita, Daniel S. ;

Dax, Andreas ;

Dhawan, Satish ;

Diepold, Marc ;

Fernandes, Luis M. P. ;

Giesen, Adolf ;

Gouvea, Andrea L. ;

Graf, Thomas ;

Haensch, Theodor W. ;

Indelicato, Paul ;

Julien, Lucile ;

Kao, Cheng-Yang ;

Knowles, Paul ;

Kottmann, Franz ;

Le Bigot, Eric-Olivier ;

Liu, Yi-Wei ;

Lopes, Jose A. M. ;

Ludhova, Livia ;

Monteiro, Cristina M. B. ;

Mulhauser, Francoise ;

Nebel, Tobias ;

Rabinowitz, Paul ;

dos Santos, Joaquim M. F. ;

Schaller, Lukas A. ;

Schwob, Catherine ;

Taqqu, David ;

Veloso, Joao F. C. A. ;

Vogelsang, Jan ;

Pohl, Randolf .

SCIENCE, 2013, 339 (6118) :417-420

[5] Extended partial-wave analysis of πN scattering data [J].

Arndt, R. A. ;

Briscoe, W. J. ;

Strakovsky, I. I. ;

Workman, R. L. .

PHYSICAL REVIEW C, 2006, 74 (04)

[6] USE OF PARTIAL-WAVE REPRESENTATIONS IN PLANNING OF SCATTERING MEASUREMENTS - APPLICATION TO 330 MEV NP SCATTERING [J].

ARNDT, RA ;

ROPER, LD .

NUCLEAR PHYSICS B, 1972, B 50 (DEC15) :285-&

[7] Global analysis of proton elastic form factor data with two-photon exchange corrections [J].

Arrington, J. ;

Melnitchouk, W. ;

Tjon, J. A. .

PHYSICAL REVIEW C, 2007, 76 (03)

[8] Electric and magnetic form factors of the proton [J].

Bernauer, J. C. ;

Distler, M. O. ;

Friedrich, J. ;

Walcher, Th ;

Achenbach, P. ;

Gayoso, C. Ayerbe ;

Boehm, R. ;

Bosnar, D. ;

Debenjak, L. ;

Doria, L. ;

Esser, A. ;

Fonvieille, H. ;

de la Paz, M. Gomez Rodriguez ;

Friedrich, J. M. ;

Makek, M. ;

Merkel, H. ;

Middleton, D. G. ;

Mueller, U. ;

Nungesser, L. ;

Pochodzalla, J. ;

Potokar, M. ;

Majos, S. Sanchez ;

Schlimme, B. S. ;

Sirca, S. ;

Weinriefer, M. .

PHYSICAL REVIEW C, 2014, 90 (01)

[9] π± p differential cross sections at low energies [J].

Denz, H ;

Amaudruz, P ;

Brack, JT ;

Breitschopf, J ;

Camerini, P ;

Clark, JL ;

Clement, H ;

Felawka, L ;

Fragiacomo, E ;

Gibson, EF ;

Grion, N ;

Hofman, GJ ;

Jamieson, B ;

Mathie, EL ;

Meier, R ;

Moloney, G ;

Ottewell, D ;

Patarakin, O ;

Patterson, JD ;

Pavan, MM ;

Piano, S ;

Raywood, K ;

Ristinen, RA ;

Rui, R ;

Sevior, ME ;

Smith, GR ;

Stahov, J ;

Tacik, R ;

Wagner, GJ ;

von Wrochem, F ;

Yeomans, DM .

PHYSICS LETTERS B, 2006, 633 (2-3) :209-213

[10]

Denz H., 2004, THESIS TUBINGEN U

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