Resonance Production and ππ S-wave in π- + p -> π- π- π+ + p_recoil at 190 GeV/c

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00307614" target="_blank" >RIV/68407700:21340/17:00307614 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.95.032004" target="_blank" >https://doi.org/10.1103/PhysRevD.95.032004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.95.032004" target="_blank" >10.1103/PhysRevD.95.032004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Resonance Production and ππ S-wave in π- + p -> π- π- π+ + p_recoil at 190 GeV/c

Popis výsledku v původním jazyce

The COMPASS collaboration has collected the currently largest data set on diffractively produced π-π-π+ final states using a negative pion beam of 190  GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, 0.5<m3π<2.5  GeV/c2, and in 11 bins of the reduced four-momentum transfer squared, 0.1<t'<1.0  (GeV/c)2. This two-dimensional analysis offers sensitivity to genuine one-step resonance production, i.e. the production of a state followed by its decay, as well as to more complex dynamical effects in nonresonant 3π production. In this paper, we present detailed studies on selected 3π partial waves with JPC=0-+, 1++, 2-+, 2++, and 4++. In these waves, we observe the well-known ground-state mesons as well as a new narrow axial-vector meson a1(1420) decaying into f0(980)π. In addition, we present the results of a novel method to extract the amplitude of the π-π+ subsystem with IGJPC=0+0++ in various partial waves from the π-π-π+ data. Evidence is found for correlation of the f0(980) and f0(1500) appearing as intermediate π-π+ isobars in the decay of the known π(1800) and π2(1880).

Název v anglickém jazyce

Resonance Production and ππ S-wave in π- + p -> π- π- π+ + p_recoil at 190 GeV/c

Popis výsledku anglicky

The COMPASS collaboration has collected the currently largest data set on diffractively produced π-π-π+ final states using a negative pion beam of 190  GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, 0.5<m3π<2.5  GeV/c2, and in 11 bins of the reduced four-momentum transfer squared, 0.1<t'<1.0  (GeV/c)2. This two-dimensional analysis offers sensitivity to genuine one-step resonance production, i.e. the production of a state followed by its decay, as well as to more complex dynamical effects in nonresonant 3π production. In this paper, we present detailed studies on selected 3π partial waves with JPC=0-+, 1++, 2-+, 2++, and 4++. In these waves, we observe the well-known ground-state mesons as well as a new narrow axial-vector meson a1(1420) decaying into f0(980)π. In addition, we present the results of a novel method to extract the amplitude of the π-π+ subsystem with IGJPC=0+0++ in various partial waves from the π-π-π+ data. Evidence is found for correlation of the f0(980) and f0(1500) appearing as intermediate π-π+ isobars in the decay of the known π(1800) and π2(1880).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2015058" target="_blank" >LM2015058: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

95

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

74

Strana od-do

—

Kód UT WoS článku

000394092900001

EID výsledku v databázi Scopus

2-s2.0-85021897827