cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.98860.v1/t6
title: "Table 2.3: Rcp for p + $\bar{p}$" of "Identified baryon and meson distributions at large transverse momenta from Au + Au collisions at s(NN)**(1/2) = 200-GeV."

description: Nuclear modification factors Rcp for $\pi^{+}$ + $\pi^{-}$ and p + $\bar{p}$ in 200 GeV AuAu collisions.
description: 'Transverse momentum spectra of $\pi^{\pm}$, p and $\bar{p}$ up to 12 GeV/c at mid-rapidity in centrality selected Au+Au collisions at $\sqrt{s}_{NN}$ = 200 GeV are presented. In central Au+Au collisions, both $\pi^{\pm}$ and p($\bar{p}$) show significant suppression with respect to binary scaling at $p_{T}$ $\gtrsim$ 4GeV/c. Protons and anti-protons are less suppressed that $\pi^{\pm}$, in the range 1.5 $\lesssim$ $p_{T}$ $\lesssim$ 6 GeV/c. The $\pi^{-}$/$\pi^{+}$ and $\bar{p}$/p ratios show at most a weak $p_{T}$ dependence and no significant centrality dependence. The p/$\pi$ ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at $p_{T}$ $\gtrsim$ 5 GeV/c. The results at high at $p_{T}$ indicate that the partonic sources of $\pi^{\pm}$, p and $\bar{p}$ have similar energy loss when traversing the nuclear medium.'
DOI: 10.17182/hepdata.98860.v1/t7
title: "Table 3: The antiparticle to particle ratios" of "Identified baryon and meson distributions at large transverse momenta from Au + Au collisions at s(NN)**(1/2) = 200-GeV."

description: The $\pi^{-}$/$\pi{+}$ and $\bar{p}$/p ratios in 12 $\%$ central, MB Au+Au and d+Au collisions at $\sqrt{s}_{NN}$ = 200 GeV. Errors are statistical and point-to-point systematic.
description: 'Transverse momentum spectra of $\pi^{\pm}$, p and $\bar{p}$ up to 12 GeV/c at mid-rapidity in centrality selected Au+Au collisions at $\sqrt{s}_{NN}$ = 200 GeV are presented. In central Au+Au collisions, both $\pi^{\pm}$ and p($\bar{p}$) show significant suppression with respect to binary scaling at $p_{T}$ $\gtrsim$ 4GeV/c. Protons and anti-protons are less suppressed that $\pi^{\pm}$, in the range 1.5 $\lesssim$ $p_{T}$ $\lesssim$ 6 GeV/c. The $\pi^{-}$/$\pi^{+}$ and $\bar{p}$/p ratios show at most a weak $p_{T}$ dependence and no significant centrality dependence. The p/$\pi$ ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at $p_{T}$ $\gtrsim$ 5 GeV/c. The results at high at $p_{T}$ indicate that the partonic sources of $\pi^{\pm}$, p and $\bar{p}$ have similar energy loss when traversing the nuclear medium.'
DOI: 10.17182/hepdata.98860.v1/t8
title: "Table 4: The p/$\pi$ ratios" of "Identified baryon and meson distributions at large transverse momenta from Au + Au collisions at s(NN)**(1/2) = 200-GeV."

description: The p/$\pi^{+}$ and $\bar{p}$/$\pi^{-}$ ratios from d+Au and Au+Au collisions at $\sqrt{s}_{NN}$ = 200 GeV. The systematic uncertainties for 60-80$\%$ Au+Au collisions are similar.
description: 'Transverse momentum spectra of $\pi^{\pm}$, p and $\bar{p}$ up to 12 GeV/c at mid-rapidity in centrality selected Au+Au collisions at $\sqrt{s}_{NN}$ = 200 GeV are presented. In central Au+Au collisions, both $\pi^{\pm}$ and p($\bar{p}$) show significant suppression with respect to binary scaling at $p_{T}$ $\gtrsim$ 4GeV/c. Protons and anti-protons are less suppressed that $\pi^{\pm}$, in the range 1.5 $\lesssim$ $p_{T}$ $\lesssim$ 6 GeV/c. The $\pi^{-}$/$\pi^{+}$ and $\bar{p}$/p ratios show at most a weak $p_{T}$ dependence and no significant centrality dependence. The p/$\pi$ ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at $p_{T}$ $\gtrsim$ 5 GeV/c. The results at high at $p_{T}$ indicate that the partonic sources of $\pi^{\pm}$, p and $\bar{p}$ have similar energy loss when traversing the nuclear medium.'
DOI: 10.25549/vercoutere-ouc1sto1770475
title: Therapeutic Artworks

description: This collection includes over 900 pieces of art that were created by patients at the Atascadero State Hospital (ASH) in the mid-1950’s.  The artists were under the treatment of Albert R. Vercoutere who used the technique of providing photos from magazines for the patients to use as inspiration for their own artwork. Although not trained in the use of art therapy and during a time when art therapy was a new approach, Vercoutere often utilized art as a mechanism for working with his patients. The artwork was created during a time when psychotropic drugs were not yet available as treatment options for mental health patients.
DOI: 10.3535/13w-rrr-7xe
title: Illicium parvifolium subsp. oligandrum (Merr. & Chun) Q. Lin

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/gdr-7cm-5tm
title: Helicia nilagirica Bedd.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.17182/hepdata.98921.v1/t1
title: "Figure 2a" of "Mid-rapidity anti-proton to proton ratio from Au + Au collisions at s(N N)**(1/2) = 130-GeV."

description: pbar over p ratio vs. pt
description: We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts=130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y|&lt;0.5$ and $0.4
DOI: 10.17182/hepdata.98921.v1/t2
title: "Figure 2b" of "Mid-rapidity anti-proton to proton ratio from Au + Au collisions at s(N N)**(1/2) = 130-GeV."

description: pbar over p ratio vs. rapidity (y)
description: We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts=130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y|&lt;0.5$ and $0.4
DOI: 10.17182/hepdata.98921.v1/t3
title: "Figure 2c" of "Mid-rapidity anti-proton to proton ratio from Au + Au collisions at s(N N)**(1/2) = 130-GeV."

description: pbar over p ratio vs. centrality $(n_{ch}/n_{max})$
description: We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts=130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y|&lt;0.5$ and $0.4
DOI: 10.17182/hepdata.98921.v1/t4
title: "Figure 3" of "Mid-rapidity anti-proton to proton ratio from Au + Au collisions at s(N N)**(1/2) = 130-GeV."

description: pbar over p ratio for Heavy Ion and pp collisions
description: We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts=130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y|&lt;0.5$ and $0.4
DOI: 10.17182/hepdata.98922.v1/t1
title: "Figure 2" of "Measurement of inclusive antiprotons from Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Tranverse mass distributions for different centralities
description: We report the first measurement of inclusive antiproton production at mid-rapidity in Au+Au collisions at 130 GeV by the STAR experiment at RHIC. The antiproton transverse mass distributions in the measured transverse momentum range of 0.25 &lt; pT &lt; 0.95 GeV/c are found to fall less steeply for more central collisions. The extrapolated antiproton rapidity density is found to scale approximately with the negative hadron multiplicity density.
DOI: 10.3535/jq4-ycl-l8v
title: Euodia J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.17182/hepdata.98922.v1/t2
title: "Figure 3a" of "Measurement of inclusive antiprotons from Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Antiproton fit parameters and yields. Systematic errors are 10%.
description: We report the first measurement of inclusive antiproton production at mid-rapidity in Au+Au collisions at 130 GeV by the STAR experiment at RHIC. The antiproton transverse mass distributions in the measured transverse momentum range of 0.25 &lt; pT &lt; 0.95 GeV/c are found to fall less steeply for more central collisions. The extrapolated antiproton rapidity density is found to scale approximately with the negative hadron multiplicity density.
DOI: 10.17182/hepdata.98922.v1/t3
title: "Figure 3b" of "Measurement of inclusive antiprotons from Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Antiproton fit parameters and yields. Systematic errors are 10%.
description: We report the first measurement of inclusive antiproton production at mid-rapidity in Au+Au collisions at 130 GeV by the STAR experiment at RHIC. The antiproton transverse mass distributions in the measured transverse momentum range of 0.25 &lt; pT &lt; 0.95 GeV/c are found to fall less steeply for more central collisions. The extrapolated antiproton rapidity density is found to scale approximately with the negative hadron multiplicity density.
DOI: 10.17182/hepdata.98922.v1/t4
title: "Figure 3c" of "Measurement of inclusive antiprotons from Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Antiproton fit parameters and yields. Systematic errors are 10%.
description: We report the first measurement of inclusive antiproton production at mid-rapidity in Au+Au collisions at 130 GeV by the STAR experiment at RHIC. The antiproton transverse mass distributions in the measured transverse momentum range of 0.25 &lt; pT &lt; 0.95 GeV/c are found to fall less steeply for more central collisions. The extrapolated antiproton rapidity density is found to scale approximately with the negative hadron multiplicity density.
DOI: 10.17182/hepdata.98923.v1/t1
title: "Figure 1, K+" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse mass distributions for different centralities: dE/dx identified charged kaons. K+
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.17182/hepdata.98923.v1/t2
title: "Figure 1, K-" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse mass distributions for different centralities: dE/dx identified charged kaons. K-
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.25549/vercoutere-ouc1sto1769447
title: Therapeutic Artworks

description: This collection includes over 900 pieces of art that were created by patients at the Atascadero State Hospital (ASH) in the mid-1950’s.  The artists were under the treatment of Albert R. Vercoutere who used the technique of providing photos from magazines for the patients to use as inspiration for their own artwork. Although not trained in the use of art therapy and during a time when art therapy was a new approach, Vercoutere often utilized art as a mechanism for working with his patients. The artwork was created during a time when psychotropic drugs were not yet available as treatment options for mental health patients.
DOI: 10.3535/18z-tmg-b0p
title: Allophylus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/x23-fjd-rht
title: Bromus japonicus Houtt.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.17182/hepdata.98923.v1/t3
title: "Figure 1, Neutral K" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse mass distributions for different centralities: Neutral Kaons.
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.17182/hepdata.98923.v1/t4
title: "Figure 2, dN/dy" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The mid-rapidity kaon multiplicity densities ($dN/dy$) and mT exponential inverse slopes (T in MeV) as a function of negative hadron multiplicity with $|η|&lt;0.5$ ($dNh-/dη$). Quoted errors are uncorrelated errors (first) and correlated systematic errors (second). Systematic error on $dNh-/dη$ is $7\%$.
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.17182/hepdata.98923.v1/t5
title: "Figure 2, T[MeV]" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The mid-rapidity kaon multiplicity densities ($dN/dy$) and mT exponential inverse slopes (T in MeV) as a function of negative hadron multiplicity with $|η|&lt;0.5$ ($dNh-/dη$). Quoted errors are uncorrelated errors (first) and correlated systematic errors (second). Systematic error on $dNh-/dη$ is $7\%$.
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.17182/hepdata.98923.v1/t6
title: "Figure 3" of "Kaon production and kaon to pion ratio in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Central 0-6% K/π yield ratios.
description: Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K+/π−=0.161±0.002(stat)±0.024(syst) and K−/π−=0.146±0.002(stat)±0.022(syst) for the most central collisions. The K+/π− ratio is lower than the same ratio observed at the SPS while the K−/π− is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and p¯+p collision data at similar energies.
DOI: 10.17182/hepdata.98924.v1/t1
title: "Figure 1a" of "Strange anti-particle to particle ratios at mid-rapidity in s(NN)**(1/2) = 130-GeV Au + Au collisions."

description: Invariant mass distributions for $\Lambda$ and Anti-$\Lambda$
description: Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71 +/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05 (sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092 +/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au collisions using the STAR detector. The ratios indicate that a fraction of the net-baryon number from the initial system is present in the excess of hyperons over anti-hyperons at mid-rapidity. The trend in the progression of the baryon ratios, with increasing strange quark content, is similar to that observed in heavy-ion collisions at lower energies. The value of these ratios may be related to the charged kaon ratio in the framework of simple quark-counting and thermal models.
DOI: 10.17182/hepdata.98924.v1/t2
title: "Figure 1b" of "Strange anti-particle to particle ratios at mid-rapidity in s(NN)**(1/2) = 130-GeV Au + Au collisions."

description: Invariant mass distributions for $\Xi$ and Anti-$\Xi$
description: Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71 +/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05 (sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092 +/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au collisions using the STAR detector. The ratios indicate that a fraction of the net-baryon number from the initial system is present in the excess of hyperons over anti-hyperons at mid-rapidity. The trend in the progression of the baryon ratios, with increasing strange quark content, is similar to that observed in heavy-ion collisions at lower energies. The value of these ratios may be related to the charged kaon ratio in the framework of simple quark-counting and thermal models.
DOI: 10.3535/404-q59-zl4
title: Engelhardia roxburghiana Wall.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/61z-kkp-13k
title: Leucospermum saxosum S. Moore

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.17182/hepdata.98924.v1/t3
title: "Figure 1c" of "Strange anti-particle to particle ratios at mid-rapidity in s(NN)**(1/2) = 130-GeV Au + Au collisions."

description: Invariant mass distributions for $\Omega$ and Anti-$\Omega$
description: Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71 +/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05 (sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092 +/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au collisions using the STAR detector. The ratios indicate that a fraction of the net-baryon number from the initial system is present in the excess of hyperons over anti-hyperons at mid-rapidity. The trend in the progression of the baryon ratios, with increasing strange quark content, is similar to that observed in heavy-ion collisions at lower energies. The value of these ratios may be related to the charged kaon ratio in the framework of simple quark-counting and thermal models.
DOI: 10.17182/hepdata.98924.v1/t4
title: "Figure 2" of "Strange anti-particle to particle ratios at mid-rapidity in s(NN)**(1/2) = 130-GeV Au + Au collisions."

description: The ratios Anti-Λ/Λ, K+/K-, and Anti-Ξ+/Ξ- as a function of pT
description: Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71 +/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05 (sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092 +/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au collisions using the STAR detector. The ratios indicate that a fraction of the net-baryon number from the initial system is present in the excess of hyperons over anti-hyperons at mid-rapidity. The trend in the progression of the baryon ratios, with increasing strange quark content, is similar to that observed in heavy-ion collisions at lower energies. The value of these ratios may be related to the charged kaon ratio in the framework of simple quark-counting and thermal models.
DOI: 10.17182/hepdata.98924.v1/t5
title: "Figure 3" of "Strange anti-particle to particle ratios at mid-rapidity in s(NN)**(1/2) = 130-GeV Au + Au collisions."

description: Anti-baryon to baryon ratios measured by STAR
description: Values of the ratios in the mid-rapidity yields of anti-Lambda/Lambda = 0.71 +/- 0.01(stat.) +/- 0.04(sys.), anti-Xi+/Xi- = 0.83 +/- 0.04(stat.) +/- 0.05 (sys.), anti-Omega+/Omega- = 0.95 +/- 0.15(stat) +/- 0.05(sys.) and K+/K- 1.092 +/- 0.023(combined) were obtained in central sqrt(s_NN) = 130 GeV Au+Au collisions using the STAR detector. The ratios indicate that a fraction of the net-baryon number from the initial system is present in the excess of hyperons over anti-hyperons at mid-rapidity. The trend in the progression of the baryon ratios, with increasing strange quark content, is similar to that observed in heavy-ion collisions at lower energies. The value of these ratios may be related to the charged kaon ratio in the framework of simple quark-counting and thermal models.
DOI: 10.17182/hepdata.98925.v1/t1
title: "Figure 4" of "Photon and neutral pion production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Data for the electron-positron invariant mass plots
description: We report the first inclusive photon measurements about mid-rapidity (|y|&lt;0.5) from Au+Au collisions at sqrt(s_{NN}) = 130 GeV at RHIC. Photon pair conversions were reconstructed from electron and positron tracks measured with the Time Projection Chamber (TPC) of the STAR experiment. With this method, an energy resolution of Delta(E)/E = 2% at 0.5 GeV has been achieved. Reconstructed photons have also been used to measure the transverse momentum (pt) spectra of pi0 mesons about mid-rapidity (|y|&lt;1) via the pi0 -&gt; photon photon decay channel. The fractional contribution of the pi0 -&gt; photon photon decay to the inclusive photon spectrum decreases by 20% +/- 5% between pt = 1.65 GeV/c and pt = 2.4 GeV/c in the most central events, indicating that relative to pi0 -&gt; photon photon decay the contribution of other photon sources is substantially increasing.