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Address: 90 London Rd, South Bank, London SE1 6LN, UK

Hours: Closed ⋅ Opens 9AM |

Phone: +44 20 8144 4348

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In general, the on-the-mass-shell value of the self-energy operator in the momentum-energy representation is complex. In such cases, it is the real part of this self-energy that is identified with the physical self-energy (referred to above as particle's "self-energy"); the inverse of the imaginary part is a measure for the lifetime of the particle under investigation.

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Address: Black Swan House, 23 Baldock St, Ware SG12 9DH, United Kingdom

Hours: Closed ⋅ Opens 8AM |

Phone: +44 1920 486156

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Green Energy - Green Gas | Green Energy UK

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100% renewable, ethical energy, including 100% green gas. No coal, no nuclear. No call centres or call menus. No exit fees or fixed contracts. Switch to Green Energy today!

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Address: Monkton Hill, Monkton Reach, Chippenham SN15 1EE, United Kingdom
Hours: Closed ⋅ Opens 8AM |

Phone: +44 800 254 0000

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Renewable Energy Supplier | Renewable Energy UK | Good Energy

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Green energy for your home or business. Good Energy supplies 100% renewable electricity and installs heat pumps and solar panels.