First measurement of the K−n →Λπ− non-resonant transition amplitude below threshold

K. Piscicchia; S. Wycech; L. Fabbietti; M. Cargnelli; C. Curceanu; R. Del Grande; J. Marton; P. Moskal; A. Scordo; M. Silarski; D. Sirghi; M. Skurzok; I. Tucakovic; O. Vázquez Doce; J. Zmeskal; P. Branchini; E. Czerwinski; V. De Leo; E. De Lucia; A. Di Cicco; P. Fermani; S. Fiore; W. Krzemien; G. Mandaglio; M. Martini; E. Perez del Rio; A. Selce

doi:10.1016/j.physletb.2018.05.025

First measurement of the K⁻n →Λπ⁻ non-resonant transition amplitude below threshold

K. Piscicchia
, S. Wycech
, L. Fabbietti
, M. Cargnelli
, C. Curceanu
, R. Del Grande
, J. Marton
, P. Moskal
, A. Scordo
, M. Silarski
, D. Sirghi
, M. Skurzok
, I. Tucakovic
, O. Vázquez Doce
, J. Zmeskal
, P. Branchini
, E. Czerwinski
, V. De Leo
, E. De Lucia
, A. Di Cicco

P. Fermani, S. Fiore, W. Krzemien, G. Mandaglio, M. Martini, E. Perez del Rio, A. Selce

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

Centro Fermi
INFN, Laboratori Nazionali Di Frascati
National Center for Nuclear Research (NCBJ)
Cluster of Excellence E-conversion
Stefan Meyer Institut für Subatomare Physik (SMI)
University of Rome Tor Vergata
Jagiellonian University
Rudjer Boskovic Institute
Technical University of Munich
Sezione INFN di Roma La Sapienza
INFN Sezione di Roma Tor Vergata
Sez. di Roma Tre
C.R.ENEA
Multimedia and Distributed Systems Laboratory
Laboratori Nazionali Del Sud
Università 'Guglielmo Marconi'

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

We present the analysis of K⁻ absorption processes on He4 leading to Λπ⁻ final states, measured with the KLOE spectrometer at the DAΦNE e⁺e⁻ collider and extract, for the first time, the modulus of the non-resonant K⁻n →Λπ⁻ direct production amplitude about 33 MeV below the K‾N threshold. This analysis also allows to disentangle the K⁻ nuclear absorption at-rest from the in-flight capture, for K⁻ momenta of about 120 MeV. The data are interpreted with the help of a phenomenological model, and the modulus of the non-resonant K⁻n →Λπ⁻ amplitude for K⁻ absorption at-rest is found to be |A_{K⁻n→Λπ⁻}|=(0.334±0.018stat_−0.058 ^+0.034syst)fm.

Original language	English
Pages (from-to)	339-345
Number of pages	7
Journal	Physics Letters B
Volume	782
DOIs	https://doi.org/10.1016/j.physletb.2018.05.025
State	Published - 10 Jul 2018

Keywords

Antikaon interactions in nuclear matter
Strangeness nuclear physics
Strong interaction

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10.1016/j.physletb.2018.05.025

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Piscicchia, K., Wycech, S., Fabbietti, L., Cargnelli, M., Curceanu, C., Del Grande, R., Marton, J., Moskal, P., Scordo, A., Silarski, M., Sirghi, D., Skurzok, M., Tucakovic, I., Vázquez Doce, O., Zmeskal, J., Branchini, P., Czerwinski, E., De Leo, V., De Lucia, E., ... Selce, A. (2018). First measurement of the K⁻n →Λπ⁻ non-resonant transition amplitude below threshold. Physics Letters B, 782, 339-345. https://doi.org/10.1016/j.physletb.2018.05.025

@article{8ba2ed098059471fb2daf7ded575fdfb,

title = "First measurement of the K−n →Λπ− non-resonant transition amplitude below threshold",

abstract = "We present the analysis of K− absorption processes on He4 leading to Λπ− final states, measured with the KLOE spectrometer at the DAΦNE e+e− collider and extract, for the first time, the modulus of the non-resonant K−n →Λπ− direct production amplitude about 33 MeV below the K‾N threshold. This analysis also allows to disentangle the K− nuclear absorption at-rest from the in-flight capture, for K− momenta of about 120 MeV. The data are interpreted with the help of a phenomenological model, and the modulus of the non-resonant K−n →Λπ− amplitude for K− absorption at-rest is found to be |AK−n→Λπ− |=(0.334±0.018stat−0.058 +0.034syst)fm.",

keywords = "Antikaon interactions in nuclear matter, Strangeness nuclear physics, Strong interaction",

author = "K. Piscicchia and S. Wycech and L. Fabbietti and M. Cargnelli and C. Curceanu and \{Del Grande\}, R. and J. Marton and P. Moskal and A. Scordo and M. Silarski and D. Sirghi and M. Skurzok and I. Tucakovic and \{V{\'a}zquez Doce\}, O. and J. Zmeskal and P. Branchini and E. Czerwinski and \{De Leo\}, V. and \{De Lucia\}, E. and \{Di Cicco\}, A. and P. Fermani and S. Fiore and W. Krzemien and G. Mandaglio and M. Martini and \{Perez del Rio\}, E. and A. Selce",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

year = "2018",

month = jul,

day = "10",

doi = "10.1016/j.physletb.2018.05.025",

language = "English",

volume = "782",

pages = "339--345",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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Piscicchia, K, Wycech, S, Fabbietti, L, Cargnelli, M, Curceanu, C, Del Grande, R, Marton, J, Moskal, P, Scordo, A, Silarski, M, Sirghi, D, Skurzok, M, Tucakovic, I, Vázquez Doce, O, Zmeskal, J, Branchini, P, Czerwinski, E, De Leo, V, De Lucia, E, Di Cicco, A, Fermani, P, Fiore, S, Krzemien, W, Mandaglio, G, Martini, M, Perez del Rio, E & Selce, A 2018, 'First measurement of the K⁻n →Λπ⁻ non-resonant transition amplitude below threshold', Physics Letters B, vol. 782, pp. 339-345. https://doi.org/10.1016/j.physletb.2018.05.025

TY - JOUR

T1 - First measurement of the K−n →Λπ− non-resonant transition amplitude below threshold

AU - Piscicchia, K.

AU - Wycech, S.

AU - Fabbietti, L.

AU - Cargnelli, M.

AU - Curceanu, C.

AU - Del Grande, R.

AU - Marton, J.

AU - Moskal, P.

AU - Scordo, A.

AU - Silarski, M.

AU - Sirghi, D.

AU - Skurzok, M.

AU - Tucakovic, I.

AU - Vázquez Doce, O.

AU - Zmeskal, J.

AU - Branchini, P.

AU - Czerwinski, E.

AU - De Leo, V.

AU - De Lucia, E.

AU - Di Cicco, A.

AU - Fermani, P.

AU - Fiore, S.

AU - Krzemien, W.

AU - Mandaglio, G.

AU - Martini, M.

AU - Perez del Rio, E.

AU - Selce, A.

PY - 2018/7/10

Y1 - 2018/7/10

N2 - We present the analysis of K− absorption processes on He4 leading to Λπ− final states, measured with the KLOE spectrometer at the DAΦNE e+e− collider and extract, for the first time, the modulus of the non-resonant K−n →Λπ− direct production amplitude about 33 MeV below the K‾N threshold. This analysis also allows to disentangle the K− nuclear absorption at-rest from the in-flight capture, for K− momenta of about 120 MeV. The data are interpreted with the help of a phenomenological model, and the modulus of the non-resonant K−n →Λπ− amplitude for K− absorption at-rest is found to be |AK−n→Λπ− |=(0.334±0.018stat−0.058 +0.034syst)fm.

AB - We present the analysis of K− absorption processes on He4 leading to Λπ− final states, measured with the KLOE spectrometer at the DAΦNE e+e− collider and extract, for the first time, the modulus of the non-resonant K−n →Λπ− direct production amplitude about 33 MeV below the K‾N threshold. This analysis also allows to disentangle the K− nuclear absorption at-rest from the in-flight capture, for K− momenta of about 120 MeV. The data are interpreted with the help of a phenomenological model, and the modulus of the non-resonant K−n →Λπ− amplitude for K− absorption at-rest is found to be |AK−n→Λπ− |=(0.334±0.018stat−0.058 +0.034syst)fm.

KW - Antikaon interactions in nuclear matter

KW - Strangeness nuclear physics

KW - Strong interaction

UR - https://www.scopus.com/pages/publications/85047398696

U2 - 10.1016/j.physletb.2018.05.025

DO - 10.1016/j.physletb.2018.05.025

M3 - Article

AN - SCOPUS:85047398696

SN - 0370-2693

VL - 782

SP - 339

EP - 345

JO - Physics Letters B

JF - Physics Letters B

ER -

First measurement of the K⁻n →Λπ⁻ non-resonant transition amplitude below threshold

Abstract

Keywords

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