1 / 9

Rough Idea of K + +A  K *+X Experiments

Rough Idea of K + +A  K *+X Experiments. Masashi Kaneta Department of Physics Tohoku University. Motivation. Medium effect for vector meson is at KEK-PS via f , r , w channels. f. r,w. m*/m. How about the other vector meson? K * effect might be between f and r , w

johnson
Download Presentation

Rough Idea of K + +A  K *+X Experiments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rough Idea ofK ++AK *+X Experiments Masashi Kaneta Department of Physics Tohoku University Masashi Kaneta, Tohoku Univ.

  2. Motivation • Medium effect for vector meson is at KEK-PS • via f, r, w channels f r,w m*/m • How about the other vector meson? • K* • effect might be between f and r, w • T.Hatsuda said, result from Walecka model are different from one of QCD sum rule • K* seems to be fine with Kaon beam at J-PARC r/r0 predictions from Hatsuda and Lee Masashi Kaneta, Tohoku Univ.

  3. K*(892) from PDG Masashi Kaneta, Tohoku Univ.

  4. K ++p(n) K* +X cross-section PRC61 (1999) 024901 (Note: original data points from Total Cross-Sections for Reactions of High Energy Particles, edited by A. Baldni, V. Flaminio, W. G. Moorhead, and D. R. O. Morrison ~Springer-Verlag, Berlin, 1988!, Vols. 12a, 12b.) Masashi Kaneta, Tohoku Univ.

  5. K * Experiments • K++A reaction • Measure K*+ K++g • >1 mb • ~ 2.6 (1.1) mb for 1.8GeV/c K++p (n) • ~ 4 (4) mb for 1.5GeV/c K++p (n) • ~ 1.3 (0.5) mb for 1.1GeV/c K++p (n) • Branching ratio is 0.001 for K*+ K++g • Mean free path of K = 5-6 fm/c • Detector • K+: high resolution spectrometer • : EMCal (should be sensitive <1GeV) • like SKS + FOREST at K1.8 • like SSKS (or HKS) + FOREST at K1.1 Masashi Kaneta, Tohoku Univ.

  6. K * Experiments • K*+ K++g • Need to be estimate quantitatively • beam momentum • yield • efficiency: K+ and g momentum and angle distribution • trigger • background • K*+  K++p0 itself makes a background • Via K+p decay channel? • K++p- or K++p0, or K0+p+ • Large solid angle spectrometer with enough resolution • J-PARC E16 + TOF (MRPC?) • K++A: K1.8 • p+A: 30GeV or 50GeV primary proton beam Masashi Kaneta, Tohoku Univ.

  7. bg dependence NPA774 (2006) 723 Masashi Kaneta, Tohoku Univ.

  8. bg JAM Calculation 1.3 GeV/c K+ + p 1.2 GeV/c K+ + p 1.1 GeV/c K+ + p 1.4 GeV/c K+ + p 1.8 GeV/c K+ + p 1.5 GeV/c K+ + p K *+bg Masashi Kaneta, Tohoku Univ.

  9. K *+ mass JAM Calculation 1.3 GeV/c K+ + p 1.2 GeV/c K+ + p 1.1 GeV/c K+ + p 1.8 GeV/c K+ + p 1.5 GeV/c K+ + p 1.4 GeV/c K+ + p Masashi Kaneta, Tohoku Univ.

More Related