Kp scattering and hyperon excitations in a chiral quark model

  • A chiral quark-model approach is employed to study the KN scattering at low energies. The processes of Kp→Σ0π0, Λπ0 and K0n at PK≤800 MeV/c (i.e. the center mass energy W≤1.7 GeV) are investigated. The analysis shows that the Λ(1405)S01 dominates the processes Kp→Σ0π0, K0n in the energy region considered here. Around PK=400 MeV/c, the Λ(1520)D03 is responsible for a strong resonant peak in the cross section of Kp→Σ0π0 and K0n. To reproduce the data, an unexpectedly large coupling for Λ(1520)D03 to KN is needed. In contrast, the coupling for Λ(1670)S01 to KN appears to be weak, which could be due to configuration mixings between Λ(1405)S01 and Λ(1670)S01. By analyzing Kp→Λπ0, evidences for two low mass S-wave states, Σ(1480)S11 and Σ(1560)S11, seem to be available. With these two states, the reaction Kp→K0n can also be described well. However, it is difficult to understand the low masses of Σ(1480)S11 and Σ(1560)S11. The s-channel amplitudes for Kp→Λπ0 are also larger than the naive quark model expectations. The non-resonant background contributions, i.e. t-channel and/or u-channel, also play important roles in the explanation of the angular distributions due to amplitude interferences.

  • 加载中
  • [1] . Isgur N, Karl G. Phys. Rev. D, 1978, 18: 41872. Capstick S, Isgur N. Phys. Rev. D, 1986, 34: 28093. Loring U, Metsch B C, Petry H R. Eur. Phys. J. A, 2001,10: 4474. Dalitz R H, Tuan S F. Phys. Rev. Lett. 1959, 2: 425 ;Annals Phys. 1960, 10: 3075. Oset E, Ramos A. Nucl. Phys. A 1998, 635: 996. Oller J A, Meissner U G. Phys. Lett. B, 2001, 500: 2637. Jido D, Oller J A, Oset E, Ramos A, Meissner U G. Nucl.Phys. A, 2003, 725: 1818. Oller J A, Prades J, Verbeni M. Phys. Rev. Lett. 2005, 95:1725029. Oller J A. Eur. Phys. J. A, 2006, 28: 6310. Oller J A, Prades J, Verbeni M. Eur. Phys. J. A, 2007, 31:52711. Garcia-Recio C, Nieves J, Ruiz Arriola E, Vicente Va-cas M J. Phys. Rev. D, 2003, 67: 07600912. Roca L, Hyodo T, Jido D. Nucl. Phys. A, 2008, 809: 6513. Oset E, Ramos A, Bennhold C. Phys. Lett. B, 2002, 527:99; 530: 26014. Antonio O. Bouzasa. Eur. Phys. J. A, 2008, 37: 20115. Particle Data Group, Yao Y M et al. J. Phys. G, 2006, 33:116. Manweiler R et al. Phys. Rev. C, 2008, 77: 01520517. Prakhov S et al. Phys. Rev. C, 2009, 80: 025204[arXiv:0812.1888 [hep-ex]]18. Abdullah T, Close F E. Phys. Rev. D, 1972, 5: 233219. Close F E, LI Z P. Phys. Rev. D, 1990, 42: 219420. ZHAO Q, Al-Khalili J S, Bennhold C. Phys. Rev. C, 2001,64: 052201(R)21. ZHAO Q, Saghai B, LI Z P. J. Phys. G, 2002, 28: 129322. ZHAO Q, LI Z P, Bennhold C. Phys. Rev. C, 1998, 58:2393; Phys. Lett. B, 1998, 436: 4223. HE J, Saghai B, LI Z P. Phys. Rev. C, 2008, 78: 03520424. LI Z P. Phys. Rev. D, 1993, 48: 3070; 1994, 50: 5639;1995, 52: 4961; C, 1995, 52: 164825. LI Z P, YE H X, LU M H. Phys. Rev. C, 1997, 56: 109926. ZHAO Q, Al-Khalili J S, LI Z P, Workman R L. Phys. Rev.C, 2002, 65: 06520427. ZHONG X H, ZHAO Q, HE J, Saghai B. Phys. Rev. C,2007, 76: 06520528. ZHONG X H, ZHAO Q. Phys. Rev. C, 2009, 79: 045202;Chinese Physics C, 2009, 33: 137729. ZHONG X H, ZHAO Q. Phys. Rev. D, 2008, 77: 074008;Phys. Rev. D, 2008, 78: 01402930. Isgur N, Karl G. Phys. Lett. B, 1977, 72: 109; Phys. Rev.D, 1979, 19: 2653; 1981, 23: 817; 1979, 20: 119131. Bugg D V, Sarantsev A V, ZOU B S. Nucl. Phys. B, 1996,471: 59; LI L, ZOU B S, LI G L. Phys. Rev. D, 2003,67: 034025; Lohse D et al. Nucl. Phys. A, 1990, 516: 513;Bramon A, Grau A, Pancheri G, Phys. Lett. B, 1992, 289:97; Bramon A, Escribano R, J. L. Lucio Martinez, Nap-suciale M. Phys. Lett. B, 2001, 517: 345; Roca L, Palo-mar J E, Oset E, Chiang H Q. Nucl. Phys. A, 2004, 744:127; Klingl F, Kaiser N, Weise W. Z. Phys. A, 1996, 356:19332. WU F Q, ZOU B S. Chinese Physics C, 2008, 32: 62933. I. Zychor et al. Phys. Rev. Lett., 2006, 96: 01200234. Garcia-Recio C, Lutz M F M, Nieves J. Phys. Lett. B, 2004,582: 4935. WU J J, Dulat S, ZOU B S. Phys. Rev. D, 2009, 80: 01750336. Mast T S, Alston-Garnjost M, Bangerter R O, Barbaro-Galtieri A S, Solmitz F T and Tripp R D. Phys. Rev. D,1976, 14: 1337. Berley D et al. Phys. Rev. D, 1970, 1: 1996; 1971, 3: 229738. Jones M, Levi Setti R, Merrill D, Tripp R D. Nucl. Phys.B, 1975, 90: 34939. Alston-Garnjost M, Kenney R W, Pollard D L, Ross R R,Tripp R D, Nicholson H, Ferro-Luzzi M. Phys. Rev. D,1978, 17: 2216; Phys. Rev. Lett., 1977, 38: 100340. Kim J K. Phys. Rev. Lett., 1965, 14: 29; Columbia Uni-versity Report, Nevis, 1966, 149; Phys. Rev. Lett., 1967,19: 107441. Evans D, Major J V, Rondio E, Zakrzewski J A, Con-boy J E, Miller D J, Tymieniecka T. J. Phys. G, 1983,9: 88542. Ciborowski J et al. J. Phys. G, 1982, 8: 1343. Armenteros R et al. Nucl. Phys. B, 1970, 21: 1544. Ponte R A et al. Phys. Rev. D, 1975, 12: 259745. Baxter D F et al. Nucl. Phys. B, 1973, 67: 12546. Cameron W, Franek B, Gopal G P, Kalmus G E, Ba-con T C, Butterworth I, Stern R A. Nucl. Phys. B, 1981,193: 2147. Conforto B et al (Rutherford-London collaboration). Nucl.Phys. B, 1976, 105: 18948. Mast T S, Alston-Garnjost M et al. Phys. Rev. D, 1975,11: 307849. London G W et al. Nucl. Phys. B, 1975, 85: 289
  • 加载中

Get Citation
ZHONG Xian-Hui and ZHAO Qiang. Kp scattering and hyperon excitations in a chiral quark model[J]. Chinese Physics C, 2010, 34(9): 1428-1432. doi: 10.1088/1674-1137/34/9/062
ZHONG Xian-Hui and ZHAO Qiang. Kp scattering and hyperon excitations in a chiral quark model[J]. Chinese Physics C, 2010, 34(9): 1428-1432.  doi: 10.1088/1674-1137/34/9/062 shu
Milestone
Received: 2010-03-04
Revised: 1900-01-01
Article Metric

Article Views(2218)
PDF Downloads(397)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Kp scattering and hyperon excitations in a chiral quark model

    Corresponding author: ZHONG Xian-Hui,

Abstract: 

A chiral quark-model approach is employed to study the KN scattering at low energies. The processes of Kp→Σ0π0, Λπ0 and K0n at PK≤800 MeV/c (i.e. the center mass energy W≤1.7 GeV) are investigated. The analysis shows that the Λ(1405)S01 dominates the processes Kp→Σ0π0, K0n in the energy region considered here. Around PK=400 MeV/c, the Λ(1520)D03 is responsible for a strong resonant peak in the cross section of Kp→Σ0π0 and K0n. To reproduce the data, an unexpectedly large coupling for Λ(1520)D03 to KN is needed. In contrast, the coupling for Λ(1670)S01 to KN appears to be weak, which could be due to configuration mixings between Λ(1405)S01 and Λ(1670)S01. By analyzing Kp→Λπ0, evidences for two low mass S-wave states, Σ(1480)S11 and Σ(1560)S11, seem to be available. With these two states, the reaction Kp→K0n can also be described well. However, it is difficult to understand the low masses of Σ(1480)S11 and Σ(1560)S11. The s-channel amplitudes for Kp→Λπ0 are also larger than the naive quark model expectations. The non-resonant background contributions, i.e. t-channel and/or u-channel, also play important roles in the explanation of the angular distributions due to amplitude interferences.

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return