${{\boldsymbol a}_{{1}}{(1260)}}$ WIDTH INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 250\text{ to }600 }$ OUR ESTIMATE
$\bf{ 420 \pm35}$ OUR AVERAGE
$380$ $\pm80$ 46M 1
AGHASYAN
2018B
 COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$430$ $\pm24$ $\pm31$
DARGENT
2017
RVUE ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$422.01$ $\pm2.10$ $\pm12.72$ 894k
AAIJ
2018AI
 LHCB ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{\mp}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\mp}}$
$576$ $\pm11$ ${}^{+89}_{-20}$ 2
MIKHASENKO
2018
RVUE ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}_{{\tau}}}$
$367$ $\pm9$ ${}^{+28}_{-25}$ 420k 3
ALEKSEEV
2010
COMP 190 ${{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit P}}{{\mathit b}^{\,'}}$
$410$ $\pm31$ $\pm30$ 4
AUBERT
2007AU
 BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \rho}^{0}}{{\mathit \rho}^{\pm}}{{\mathit \pi}^{\mp}}{{\mathit \gamma}}$
$\text{520 - 680}$ 6360 5
LINK
2007A
 FOCS ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
$480$ $\pm20$ 6
GOMEZ-DUMM
2004
RVUE ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}_{{\tau}}}$
$580$ $\pm41$ 90k
SALVINI
2004
OBLX ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$
$460$ $\pm85$ 205 7
DRUTSKOY
2002
BELL ${{\mathit B}}$ ${}^{(*)}$ ${{\mathit K}^{-}}$ ${{\mathit K}^{*0}}$
$814$ $\pm36$ $\pm13$ 37k 8
ASNER
2000
CLE2 $10.6$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ , ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{\tau}}}$
$450$ $\pm50$ 22k 9
AKHMETSHIN
1999E
 CMD2 $1.05 - 1.38$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$570$ $\pm10$ 10
BONDAR
1999
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 4 ${{\mathit \pi}}$ , ${{\mathit \tau}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit \nu}_{{\tau}}}$
$587$ $\pm27$ $\pm21$ 5904 11
ABREU
1998G
 DLPH ${{\mathit e}^{+}}{{\mathit e}^{-}}$
$478$ $\pm3$ $\pm15$ 5904 12
ABREU
1998G
 DLPH ${{\mathit e}^{+}}{{\mathit e}^{-}}$
$425$ $\pm14$ $\pm8$ 5904 13, 14
ABREU
1998G
 DLPH ${{\mathit e}^{+}}{{\mathit e}^{-}}$
$400$ $\pm35$
BARBERIS
1998B
 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit p}_{{s}}}$
$621$ $\pm32$ $\pm58$ 11, 15
ACKERSTAFF
1997R
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$, ${{\mathit \tau}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit \nu}}$
$457$ $\pm15$ $\pm17$ 12, 15
ACKERSTAFF
1997R
 OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$, ${{\mathit \tau}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit \nu}}$
$446$ $\pm21$ ${}^{+140}_{-0}$ 12
ALBRECHT
1993C
 ARG ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$239$ $\pm11$
ANDO
1992
SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$266$ $\pm13$ $\pm4$ 16
ANDO
1992
SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$465$ ${}^{+228}_{-143}$ 17
IVANOV
1991
RVUE ${{\mathit \tau}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$298$ ${}^{+40}_{-34}$ 18
IVANOV
1991
RVUE ${{\mathit \tau}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$488$ $\pm32$ 19
IVANOV
1991
RVUE ${{\mathit \tau}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$430$ $\pm50$
ARMSTRONG
1990
OMEG 300.0 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$420$ $\pm40$ 20
ISGUR
1989
RVUE ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$396$ $\pm43$ 21
BOWLER
1988
RVUE
$405$ $\pm75$ $\pm25$
BAND
1987
MAC ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$419$ $\pm108$ $\pm57$
BAND
1987
MAC ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \nu}}$
$521$ $\pm27$
ALBRECHT
1986B
 ARG ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$476$ ${}^{+132}_{-120}$ $\pm54$
RUCKSTUHL
1986
DLCO ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$462$ $\pm56$ $\pm30$
SCHMIDKE
1986
MRK2 ${{\mathit \tau}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \nu}}$
$292$ $\pm40$
BELLINI
1985
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit A}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit A}}$
$380$ $\pm100$ 22
DANKOWYCH
1981
SPEC 8.45 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$3 ${{\mathit \pi}}$
$300$ $\pm50$ 22
DAUM
1981B
 CNTR 63,94 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$3 ${{\mathit \pi}}$
$230$ $\pm50$ 23
GAVILLET
1977
HBC 4.2 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}}$3 ${{\mathit \pi}}$
1  Statistical error negligible.
2  From the pole position. Using an amplitude analysis based on approximate three-body unitary of ${{\mathit \tau}}$ data from SCHAEL 2005C.
3  Superseded by AGHASYAN 2018B.
4  The ${{\mathit \rho}^{\pm}}{{\mathit \pi}^{\mp}}$ state can be also due to the ${{\mathit \pi}{(1300)}}$.
5  Using the Breit-Wigner parameterization; strong correlation between mass and width.
6  Using the data of BARATE 1998R.
7  From a fit of the ${{\mathit K}^{-}}{{\mathit K}^{*0}}$ distribution assuming ${\mathit m}_{{{\mathit a}_{{1}}}}$= 1230 MeV and purely resonant production of the ${{\mathit K}^{-}}{{\mathit K}^{*0}}$ system.
8  From a fit to the 3${{\mathit \pi}}$ mass spectrum including the ${{\mathit K}}{{\overline{\mathit K}}^{*}{(892)}}$ threshold.
9  Using the ${{\mathit a}_{{1}}{(1260)}}$ mass of 1230 MeV.
10  From AKHMETSHIN 1999E and ASNER 2000 data using the ${{\mathit a}_{{1}}{(1260)}}$ mass of 1230 MeV.
11  Uses the model of KUHN 1990 .
12  Uses the model of ISGUR 1989 .
13  Includes the effect of a possible ${{\mathit a}_{{1}}^{\,'}}$ state.
14  Uses the model of FEINDT 1990 .
15  Supersedes AKERS 1995P.
16  Average and spread of values using 2 variants of the model of BOWLER 1975 .
17  Reanalysis of RUCKSTUHL 1986 .
18  Reanalysis of SCHMIDKE 1986 .
19  Reanalysis of ALBRECHT 1986B.
20  From a combined reanalysis of ALBRECHT 1986B, SCHMIDKE 1986 , and RUCKSTUHL 1986 .
21  From a combined reanalysis of ALBRECHT 1986B and DAUM 1981B.
22  Uses the model of BOWLER 1975 .
23  Produced in ${{\mathit K}^{-}}$ backward scattering.
  References:
AAIJ 2018AI
EPJ C78 443 Studies of the resonance structure in $D^{0} \rightarrow K^\mp \pi ^\pm \pi ^\pm \pi ^\mp $ decays
AGHASYAN 2018B
PR D98 092003 Light isovector resonances in $\pi^- p \to \pi^-\pi^-\pi^+ p$ at 190 GeV/${\it c}$
MIKHASENKO 2018
PR D98 096021 Pole position of the $a_1(1260)$ from $\tau$-decay
DARGENT 2017
JHEP 1705 143 Amplitude Analyses of ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Decays
ALEKSEEV 2010
PRL 104 241803 Observation of a $\mathit J{}^{PC} = 1-+$ Exotic Resonance in Diffractive Dissociation of 190 GeV/$\mathit c$ ${{\mathit \pi}^{-}}$ into ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
AUBERT 2007AU
PR D76 092005 The ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \pi}^{0}}$ , 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \eta}}$ , ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ and ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ Cross Sections Measured with Initial-State Radiation
LINK 2007A
PR D75 052003 Study of the ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ Decay
GOMEZ-DUMM 2004
PR D69 073002 ${{\mathit \tau}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit \nu}_{{\tau}}}$ Decays in the Resonance Effective Theory
SALVINI 2004
EPJ C35 21 ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation into Four Charged Pions at Rest and in Flight
DRUTSKOY 2002
PL B542 171 Observation of ${{\mathit B}}$ $\rightarrow$ ${{\mathit D}}{}^{(*)}$ ${{\mathit K}^{-}}{{\mathit K}}{}^{(*)0}$ Decays
ASNER 2000
PR D61 012002 Hadronic Structure in the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \nu}_{{\tau}}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ and the Sign of the ${{\mathit \nu}_{{\tau}}}$ Helicity
AKHMETSHIN 1999E
PL B466 392 ${{\mathit a}_{{1}}{(1260)}}{{\mathit \pi}}$ Dominance in the Process ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ 4 ${{\mathit \pi}}$ at Energies 1.05-1.38 GeV
BONDAR 1999
PL B466 403 On the Role of ${{\mathit a}_{{1}}{(1260)}}$ Meson in the ${{\mathit \tau}}$ $\rightarrow$ 4 ${{\mathit \pi}}{{\mathit \nu}_{{\tau}}}$ Decay
ABREU 1998G
PL B426 411 A Study of the Hadronic Resonance Structure in the Decay ${{\mathit \tau}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit \nu}_{{\tau}}}$
BARBERIS 1998B
PL B422 399 A Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ Channel in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
ACKERSTAFF 1997R
ZPHY C75 593 A Measurement of the Hadronic Decay Current and the ${{\mathit \nu}_{{\tau}}}$ Helicity in ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \nu}_{{\tau}}}$
ALBRECHT 1993C
ZPHY C58 61 Analysis of the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \nu}_{{\tau}}}$ and Determination of the ${{\mathit a}_{{1}}{(1260)}}$ Resonance Parameters
ANDO 1992
PL B291 496 Experimental Study of the Axial-Vector Resonances of ${{\mathit a}_{{1}}}$ and ${{\mathit h}_{{1}}}$ in the ${{\mathit \pi}^{-}}{{\mathit p}}$ Charge Exchange Reaction
IVANOV 1991
ZPHY C49 563 The Decay ${{\mathit \tau}}$ $\rightarrow$ 3 ${{\mathit \pi}}{{\mathit \nu}_{{\tau}}}$ and Characteristics of ${{\mathit a}_{{1}}}$ Meson
ARMSTRONG 1990
ZPHY C48 213 A Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ System Formed in the Reaction ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$) ${{\mathit p}_{{s}}}$ at 300 ${\mathrm {GeV/}}\mathit c$
ISGUR 1989
PR D39 1357 The ${{\mathit a}_{{1}}}$ in ${{\mathit \tau}}$ Decay
BOWLER 1988
PL B209 99 The Parameters of the ${{\mathit a}_{{1}}}$ Meson
BAND 1987
PL B198 297 Measurements of ${{\mathit \tau}}$ Decays to Three Pions
ALBRECHT 1986B
ZPHY C33 7 Measurement of ${{\mathit \tau}}$ Decays into Three Charged Pions
RUCKSTUHL 1986
PRL 56 2132 Study of Three Prong ${{\mathit \tau}}$ Decays and Determination of the $\mathit A_{1}$ Parameters
SCHMIDKE 1986
PRL 57 527 Study of the Decay ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \nu}_{{\tau}}}$
BELLINI 1985
SJNP 41 781 $2{}^{-}{}^{}$ Resonances in the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ Systems
DANKOWYCH 1981
PRL 46 580 Evidence for $\mathit I = 1$ (${{\mathit A}_{{1}}}$) and $\mathit I = 0$ (${{\mathit H}}$) Axial Vector Resonances in Charge Exchange
DAUM 1981B
NP B182 269 Diffractive Production of 3${{\mathit \pi}}$ States at 63 and 94 GeV
GAVILLET 1977
PL 69B 119 Backward Production of a Spin Parity $1{}^{+}{}^{}{{\mathit \rho}}{{\mathit \pi}}$ Enhancement at 1.04 GeV