${{\mathit a}_{{{1}}}{(1260)}}$ WIDTH

INSPIRE   PDGID:
M010W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 250\text{ to }600 }$ OUR ESTIMATE
$380$ $\pm80$ 46M 1
AGHASYAN
2018B
 COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$422.01$ $\pm2.10$ $\pm12.72$ 894k
AAIJ
2018AI
 LHCB ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{\mp}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\mp}}$
$430$ $\pm24$ $\pm31$ 2
DARGENT
2017
RVUE ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
$367$ $\pm9$ ${}^{+28}_{-25}$ 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  Reanalysis of CLEO data using Breit-Wigner parameterization.
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